v1.5.0-rc3 upgrade helm version to v3.4.2

Changelog.md

 # Changelog
 
+## [1.5.0-rc3] - 2020-01-07
+### Changes
+* upgrades **helm** to version v3.4.2
+
 ## [1.5.0-rc2] - 2020-12-18
 ### Fixes
 * fixing _--timeout_ setting to **helm** install routine and setting new default of 120s
@@ -127,4 +131,5 @@
 [1.4.6]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.4.5...release%2F1.4.6
 [1.4.7]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.4.6...release%2F1.4.7
 [1.5.0-rc1]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.4.7...release%2F1.5.0-rc1
-[1.5.0-rc2]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.5.0-rc1...release%2F1.5.0-rc2
\ No newline at end of file
+[1.5.0-rc2]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.5.0-rc1...release%2F1.5.0-rc2
+[1.5.0-rc3]: https://git.sc.uni-leipzig.de/ubl/bdd_dev/webmasterei/deployer/compare/release%2F1.5.0-rc2...release%2F1.5.0-rc3
\ No newline at end of file

Dockerfile

@@ -6,7 +6,7 @@ ENV APP_USER=deployer
 
 RUN apk add --no-cache bash curl git jq \
 	&& curl -L https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl >/usr/local/bin/kubectl \
-	&& curl -L https://get.helm.sh/helm-v3.4.1-linux-amd64.tar.gz | tar -zxf - -C /tmp linux-amd64/helm -O >/usr/local/bin/helm \
+	&& curl -L https://get.helm.sh/helm-v3.4.2-linux-amd64.tar.gz | tar -zxf - -C /tmp linux-amd64/helm -O >/usr/local/bin/helm \
 	&& chmod a+x /usr/local/bin/deployer /usr/local/bin/kubectl /usr/local/bin/helm \
 	&& addgroup -S ${APP_USER} \
 	&& adduser -S -h /home/${APP_USER} -G ${APP_USER} -s /bin/sh ${APP_USER}