Update version to 0.9.0

Author: Irene

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>fi.helsinki.cs.tmc.cli</groupId>
     <artifactId>tmc-cli</artifactId>
-    <version>0.8.1</version>
+    <version>0.9.0</version>
     <packaging>jar</packaging>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>