Update seed to 2.2.0

Author: adrienlauer

pom.xml

@@ -22,7 +22,7 @@
     <version>2.2.0-SNAPSHOT</version>
 
     <properties>
-        <seed.version>2.2.0-SNAPSHOT</seed.version>
+        <seed.version>2.2.0</seed.version>
         <hibernate-validator.version>5.1.3.Final</hibernate-validator.version>
 
         <compatibility.version>2.1.0</compatibility.version>