Bump to dev version 2.2.0.9000

Change-Id: I0bdf6b4a57c86ad551a7a9a011ffb96566fd238f
diff --git a/pom.xml b/pom.xml
index b93128e..e5563a2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>groupId</groupId>
     <artifactId>KorAP-Tokenizer</artifactId>
-    <version>2.2.0</version>
+    <version>2.2.0.9000</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>