diff --git a/composer.json b/composer.json
index 178d5d41976a5d23ce0270ee944e2539b2e7db45..697e88d1d320ff016e13df7a1bce44536a056dc5 100644
--- a/composer.json
+++ b/composer.json
@@ -14,12 +14,12 @@
         }
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-        "php": ">=5.6",
+        "php": ">=7.0.8",
         "aferrandini/phpqrcode": "1.0.1",
         "jasig/phpcas": "1.3.5",
         "cap60552/php-sip2": "1.0.0",
         "ahand/mobileesp": "dev-master",
-        "matthiasmullie/minify": "1.3.59",
+        "matthiasmullie/minify": "1.3.60",
         "ocramius/proxy-manager": "2.0.4",
         "oyejorge/less.php": "1.7.0.14",
         "pear/file_marc": "1.2.0",
@@ -27,46 +27,46 @@
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         "phing/phing": "2.16.1",
         "serialssolutions/summon": "1.1.0",
-        "symfony/yaml": "3.4.4",
+        "symfony/yaml": "3.4.10",
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         "vufind-org/vufindharvest": "2.3.0",
         "vufind-org/vufindhttp": "2.1.1",
         "yajra/laravel-pdo-via-oci8": "1.3.6",
-        "zendframework/zend-cache": "2.7.2",
-        "zendframework/zend-captcha": "2.7.1",
+        "zendframework/zend-cache": "2.8.2",
+        "zendframework/zend-captcha": "2.8.0",
         "zendframework/zend-code": "3.1.0",
-        "zendframework/zend-config": "3.1.0",
+        "zendframework/zend-config": "3.2.0",
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-        "zendframework/zend-crypt": "3.2.1",
-        "zendframework/zend-db": "2.9.2",
-        "zendframework/zend-dom": "2.6.0",
-        "zendframework/zend-escaper": "2.5.2",
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-        "zendframework/zend-feed": "2.9.0",
-        "zendframework/zend-filter": "2.7.2",
-        "zendframework/zend-http": "2.7.0",
-        "zendframework/zend-i18n": "2.7.4",
-        "zendframework/zend-loader": "2.5.1",
-        "zendframework/zend-log": "2.9.2",
+        "zendframework/zend-crypt": "3.3.0",
+        "zendframework/zend-db": "2.9.3",
+        "zendframework/zend-dom": "2.7.1",
+        "zendframework/zend-escaper": "2.6.0",
+        "zendframework/zend-eventmanager": "3.2.1",
+        "zendframework/zend-feed": "2.9.1",
+        "zendframework/zend-filter": "2.8.0",
+        "zendframework/zend-http": "2.8.0",
+        "zendframework/zend-i18n": "2.9.0",
+        "zendframework/zend-loader": "2.6.0",
+        "zendframework/zend-log": "2.10.0",
         "zendframework/zend-mail": "2.8.0",
         "zendframework/zend-modulemanager": "2.8.2",
         "zendframework/zend-mvc": "3.1.1",
-        "zendframework/zend-mvc-console": "1.1.11",
-        "zendframework/zend-mvc-i18n": "1.0.0",
-        "zendframework/zend-mvc-plugin-flashmessenger": "1.0.0",
+        "zendframework/zend-mvc-console": "1.2.0",
+        "zendframework/zend-mvc-i18n": "1.1.0",
+        "zendframework/zend-mvc-plugin-flashmessenger": "1.1.0",
         "zendframework/zend-paginator": "2.8.1",
-        "zendframework/zend-serializer": "2.8.1",
+        "zendframework/zend-serializer": "2.9.0",
         "zendframework/zend-servicemanager": "3.3.2",
         "zendframework/zend-session": "2.8.5",
         "zendframework/zend-soap": "2.7.0",
-        "zendframework/zend-stdlib": "3.1.0",
-        "zendframework/zend-text": "2.6.0",
+        "zendframework/zend-stdlib": "3.2.0",
+        "zendframework/zend-text": "2.7.0",
         "zendframework/zend-validator": "2.10.2",
         "zendframework/zend-view": "2.10.0",
         "zendframework/zendrest": "2.0.2",
         "zendframework/zendservice-amazon": "2.3.0",
-        "zendframework/zendservice-recaptcha": "3.0.0",
+        "zendframework/zendservice-recaptcha": "3.1.0",
         "zf-commons/zfc-rbac": "2.6.3",
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@@ -77,7 +77,7 @@
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         "phploc/phploc": "4.0.1",
         "phpmd/phpmd": "2.6.0",
-        "phpunit/phpunit": "6.5.7",
+        "phpunit/phpunit": "6.5.8",
         "sebastian/phpcpd": "3.0.1",
         "squizlabs/php_codesniffer": "3.2.3"
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diff --git a/composer.lock b/composer.lock
index b2e4ed760e210733cefbd0dcd555521f428ede2e..cd13dde330aafe80a73d33644b4351ec9cb27fed 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
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-    "content-hash": "799cbc2f88dbcf4c6e78e1c0ece3e31a",
+    "content-hash": "85e3c4925c32acdc3f23a507dab92146",
     "packages": [
         {
             "name": "aferrandini/phpqrcode",
@@ -48,6 +48,7 @@
                 "php",
                 "qrcode"
             ],
+            "abandoned": "endroid/qr-code",
             "time": "2013-07-08T09:39:08+00:00"
         },
         {
@@ -345,16 +346,16 @@
         },
         {
             "name": "matthiasmullie/minify",
-            "version": "1.3.59",
+            "version": "1.3.60",
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                 "type": "git",
                 "url": "https://github.com/matthiasmullie/minify.git",
-                "reference": "62dac3bce06de66f0d71fe6490cf1c508d3c3ff7"
+                "reference": "ab7fea80ce5ce6549baaf272bc8bd926a7e08f90"
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-                "reference": "62dac3bce06de66f0d71fe6490cf1c508d3c3ff7",
+                "url": "https://api.github.com/repos/matthiasmullie/minify/zipball/ab7fea80ce5ce6549baaf272bc8bd926a7e08f90",
+                "reference": "ab7fea80ce5ce6549baaf272bc8bd926a7e08f90",
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             "require": {
@@ -401,7 +402,7 @@
                 "minifier",
                 "minify"
             ],
-            "time": "2018-02-02T12:44:18+00:00"
+            "time": "2018-04-18T08:50:35+00:00"
         },
         {
             "name": "matthiasmullie/path-converter",
@@ -630,16 +631,16 @@
         },
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-            "version": "v2.0.11",
+            "version": "v2.0.12",
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                 "url": "https://github.com/paragonie/random_compat.git",
-                "reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8"
+                "reference": "258c89a6b97de7dfaf5b8c7607d0478e236b04fb"
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-                "reference": "5da4d3c796c275c55f057af5a643ae297d96b4d8",
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@@ -674,7 +675,7 @@
                 "pseudorandom",
                 "random"
             ],
-            "time": "2017-09-27T21:40:39+00:00"
+            "time": "2018-04-04T21:24:14+00:00"
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         {
             "name": "pear/archive_tar",
@@ -1270,6 +1271,52 @@
             ],
             "time": "2018-01-25T13:18:09+00:00"
         },
+        {
+            "name": "psr/cache",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/cache.git",
+                "reference": "d11b50ad223250cf17b86e38383413f5a6764bf8"
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+                "url": "https://api.github.com/repos/php-fig/cache/zipball/d11b50ad223250cf17b86e38383413f5a6764bf8",
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Cache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for caching libraries",
+            "keywords": [
+                "cache",
+                "psr",
+                "psr-6"
+            ],
+            "time": "2016-08-06T20:24:11+00:00"
+        },
         {
             "name": "psr/container",
             "version": "1.0.0",
@@ -1366,6 +1413,54 @@
             ],
             "time": "2016-10-10T12:19:37+00:00"
         },
+        {
+            "name": "psr/simple-cache",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/simple-cache.git",
+                "reference": "408d5eafb83c57f6365a3ca330ff23aa4a5fa39b"
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\SimpleCache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for simple caching",
+            "keywords": [
+                "cache",
+                "caching",
+                "psr",
+                "psr-16",
+                "simple-cache"
+            ],
+            "time": "2017-10-23T01:57:42+00:00"
+        },
         {
             "name": "serialssolutions/summon",
             "version": "v1.1.0",
@@ -1440,22 +1535,78 @@
             ],
             "time": "2017-01-05T08:57:09+00:00"
         },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "7cc359f1b7b80fc25ed7796be7d96adc9b354bae"
+            },
+            "dist": {
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+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/7cc359f1b7b80fc25ed7796be7d96adc9b354bae",
+                "reference": "7cc359f1b7b80fc25ed7796be7d96adc9b354bae",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.8-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                },
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2018-04-30T19:57:29+00:00"
+        },
         {
             "name": "symfony/yaml",
-            "version": "v3.4.4",
+            "version": "v3.4.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "eab73b6c21d27ae4cd037c417618dfd4befb0bfe"
+                "reference": "c5010cc1692ce1fa328b1fb666961eb3d4a85bb0"
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-                "reference": "eab73b6c21d27ae4cd037c417618dfd4befb0bfe",
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             "require": {
-                "php": "^5.5.9|>=7.0.8"
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/polyfill-ctype": "~1.8"
             },
             "conflict": {
                 "symfony/console": "<3.4"
@@ -1496,7 +1647,7 @@
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             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-21T19:05:02+00:00"
+            "time": "2018-05-03T23:18:14+00:00"
         },
         {
             "name": "vufind-org/vufindcode",
@@ -1684,30 +1835,37 @@
         },
         {
             "name": "zendframework/zend-cache",
-            "version": "2.7.2",
+            "version": "2.8.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-cache.git",
-                "reference": "c98331b96d3b9d9b24cf32d02660602edb34d039"
+                "reference": "4983dff629956490c78b88adcc8ece4711d7d8a3"
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-                "reference": "c98331b96d3b9d9b24cf32d02660602edb34d039",
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+                "reference": "4983dff629956490c78b88adcc8ece4711d7d8a3",
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-                "zendframework/zend-eventmanager": "^2.6.2 || ^3.0",
-                "zendframework/zend-servicemanager": "^2.7.5 || ^3.0.3",
-                "zendframework/zend-stdlib": "^2.7 || ^3.0"
+                "php": "^5.6 || ^7.0",
+                "psr/cache": "^1.0",
+                "psr/simple-cache": "^1.0",
+                "zendframework/zend-eventmanager": "^2.6.3 || ^3.2",
+                "zendframework/zend-servicemanager": "^2.7.8 || ^3.3",
+                "zendframework/zend-stdlib": "^2.7.7 || ^3.1"
+            },
+            "provide": {
+                "psr/cache-implementation": "1.0",
+                "psr/simple-cache-implementation": "1.0"
             },
             "require-dev": {
-                "phpbench/phpbench": "^0.10.0",
-                "phpunit/phpunit": "^4.8",
+                "cache/integration-tests": "^0.16",
+                "phpbench/phpbench": "^0.13",
+                "phpunit/phpunit": "^5.7.27 || ^6.5.8 || ^7.1.2",
                 "zendframework/zend-coding-standard": "~1.0.0",
                 "zendframework/zend-serializer": "^2.6",
-                "zendframework/zend-session": "^2.6.2"
+                "zendframework/zend-session": "^2.7.4"
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@@ -1716,9 +1874,11 @@
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                 "ext-memcached": "Memcached >= 1.0.0 to use the Memcached storage adapter",
                 "ext-mongo": "Mongo, to use MongoDb storage adapter",
+                "ext-mongodb": "MongoDB, to use the ExtMongoDb storage adapter",
                 "ext-redis": "Redis, to use Redis storage adapter",
                 "ext-wincache": "WinCache, to use the WinCache storage adapter",
                 "ext-xcache": "XCache, to use the XCache storage adapter",
+                "mongodb/mongodb": "Required for use with the ext-mongodb adapter",
                 "mongofill/mongofill": "Alternative to ext-mongo - a pure PHP implementation designed as a drop in replacement",
                 "zendframework/zend-serializer": "Zend\\Serializer component",
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@@ -1726,8 +1886,8 @@
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             "extra": {
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-                    "dev-master": "2.7-dev",
-                    "dev-develop": "2.8-dev"
+                    "dev-master": "2.8.x-dev",
+                    "dev-develop": "2.9.x-dev"
                 },
                 "zf": {
                     "component": "Zend\\Cache",
@@ -1735,6 +1895,9 @@
                 }
             },
             "autoload": {
+                "files": [
+                    "autoload/patternPluginManagerPolyfill.php"
+                ],
                 "psr-4": {
                     "Zend\\Cache\\": "src/"
                 }
@@ -1743,39 +1906,41 @@
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                 "BSD-3-Clause"
             ],
-            "description": "provides a generic way to cache any data",
-            "homepage": "https://github.com/zendframework/zend-cache",
+            "description": "Caching implementation with a variety of storage options, as well as codified caching strategies for callbacks, classes, and output",
             "keywords": [
+                "ZendFramework",
                 "cache",
-                "zf2"
+                "psr-16",
+                "psr-6",
+                "zf"
             ],
-            "time": "2016-12-16T11:35:47+00:00"
+            "time": "2018-05-01T21:58:00+00:00"
         },
         {
             "name": "zendframework/zend-captcha",
-            "version": "2.7.1",
+            "version": "2.8.0",
             "source": {
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                 "url": "https://github.com/zendframework/zend-captcha.git",
-                "reference": "2d56293a5ae3e45e7c8ee7030aa8b305768d8014"
+                "reference": "37e9b6a4f632a9399eecbf2e5e325ad89083f87b"
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-                "reference": "2d56293a5ae3e45e7c8ee7030aa8b305768d8014",
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+                "reference": "37e9b6a4f632a9399eecbf2e5e325ad89083f87b",
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-                "zendframework/zend-math": "^2.6 || ^3.0",
-                "zendframework/zend-stdlib": "^2.7 || ^3.0"
+                "zendframework/zend-math": "^2.7 || ^3.0",
+                "zendframework/zend-stdlib": "^2.7.7 || ^3.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8",
+                "phpunit/phpunit": "^5.7.27 || ^6.5.8 || ^7.1.2",
                 "zendframework/zend-coding-standard": "~1.0.0",
-                "zendframework/zend-session": "^2.6",
+                "zendframework/zend-session": "^2.8",
                 "zendframework/zend-text": "^2.6",
-                "zendframework/zend-validator": "^2.6",
+                "zendframework/zend-validator": "^2.10.1",
                 "zendframework/zendservice-recaptcha": "^3.0"
             },
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@@ -1788,8 +1953,8 @@
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             "extra": {
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-                    "dev-master": "2.7-dev",
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@@ -2554,25 +2728,26 @@
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+                "ZendFramework",
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@@ -2985,26 +3160,27 @@
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+                "ZendFramework",
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@@ -3046,45 +3223,49 @@
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-            "homepage": "https://github.com/zendframework/zend-mvc-i18n",
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+                "ZendFramework",
                 "i18n",
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+                "zf"
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-            "version": "1.0.0",
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+                "ZendFramework",
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-                "zf2"
+                "zf"
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-                "zendframework/zend-math": "^2.6",
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@@ -3283,25 +3464,25 @@
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-            "homepage": "https://github.com/zendframework/zend-serializer",
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+                "ZendFramework",
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@@ -3329,12 +3510,13 @@
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-            "homepage": "https://github.com/zendframework/zend-server",
+            "description": "Create Reflection-based RPC servers",
             "keywords": [
+                "ZendFramework",
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-                "zf2"
+                "zf"
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@@ -3526,31 +3708,31 @@
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