Prepare release 2.9.0

CHANGELOG.adoc

@@ -1,8 +1,10 @@
 = Changelog
 
 == Unreleased
-* Support configuring the default URL of the helm repository for helm 2.x via `stableRepoUrl`
 
+== Version 2.9.0
+
+* Support configuring the default URL of the helm repository for helm 2.x via `stableRepoUrl`
 
 == Version 2.8.1
 
@@ -24,7 +26,7 @@
 == Version 2.6.0
 
 * If the package can't resolve a property an exception is no longer thrown. This behaviour is now logged with a
-  warning and the packaging mojo continues.
+  warning, and the packaging mojo continues.
 
 == Version 2.5.1
 

README.adoc

@@ -20,7 +20,7 @@ Add the following to your `pom.xml`
     <plugin>
       <groupId>com.deviceinsight.helm</groupId>
       <artifactId>helm-maven-plugin</artifactId>
-      <version>2.8.1</version>
+      <version>2.9.0</version>
       <configuration>
         <chartName>my-chart</chartName>
         <chartRepoUrl>https://charts.helm.sh/stable</chartRepoUrl>
@@ -143,7 +143,7 @@ To use the `deployAtEnd` functionality it's mandatory to put the Helm Maven Plug
     <plugin>
       <groupId>com.deviceinsight.helm</groupId>
       <artifactId>helm-maven-plugin</artifactId>
-      <version>2.8.1</version>
+      <version>2.9.0</version>
       <configuration>
         <chartName>my-chart</chartName>
         <chartRepoUrl>https://charts.helm.sh/stable</chartRepoUrl>
@@ -177,7 +177,7 @@ Problem:: The following error message is a common source of trouble, lately:
 
 ...
 
-[ERROR] Failed to execute goal com.deviceinsight.helm:helm-maven-plugin:2.8.1:package (default) on project my-project: Error creating helm chart: When executing '/home/user/.m2/repository/com/deviceinsight/helm/helm/2.16.2/helm-2.16.2-linux-amd64.binary init --client-only' got result code '1' -> [Help 1]
+[ERROR] Failed to execute goal com.deviceinsight.helm:helm-maven-plugin:2.9.0:package (default) on project my-project: Error creating helm chart: When executing '/home/user/.m2/repository/com/deviceinsight/helm/helm/2.16.2/helm-2.16.2-linux-amd64.binary init --client-only' got result code '1' -> [Help 1]
 ----
 Solution:: This is likely due to an old version of helm itself. Make sure to configure `<helmVersion>` to a version >= 3.4.0 or, if you are still using Helm 2, a version >= 2.17.0 (https://github.com/helm/charts#%EF%B8%8F-deprecation-and-archive-notice[background information]).
 . {blank}