Update build to use Tycho 0.22

Change-Id: I181d7c9eb4706f2675ce83b28c1d8668a80fe7ac
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/pom.xml b/pom.xml
index 23b5b8e..10ac5fc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
 
   <properties>
     <calc-version>0.1.0-SNAPSHOT</calc-version>
-    <tycho-version>0.14.1</tycho-version>
+    <tycho-version>0.22.0</tycho-version>
     <junit-version>4.8.1</junit-version>
   </properties>