Merge tag '2.2.1' into develop

Rel

* tag '2.2.1':
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release halbuilder-api-2.2.1

pom.xml

@@ -3,7 +3,7 @@
 
     <groupId>com.theoryinpractise</groupId>
     <artifactId>halbuilder-api</artifactId>
-    <version>2.2.1-SNAPSHOT</version>
+    <version>2.2.2-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>halbuilder-api</name>