[maven-release-plugin] prepare release v2.1.9

Author: ktoso

pom.xml

@@ -10,7 +10,7 @@
   <groupId>pl.project13.maven</groupId>
   <artifactId>git-commit-id-plugin</artifactId>
   <packaging>maven-plugin</packaging>
-  <version>2.1.9-SNAPSHOT</version>
+  <version>2.1.9</version>
   <name>Git Commit Id Plugin Maven Mojo</name>
   <description>
     git-commit-id-plugin is a plugin quite similar to