upgrade to tycho 0.18

fortiss-std-env/pom.xml

@@ -8,7 +8,7 @@
 
   <name>fortiss Standard Parent POM</name>
   <properties>
-    <tycho-version>0.15.0</tycho-version>
+    <tycho-version>0.18.0</tycho-version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
     
@@ -54,7 +54,7 @@
     									tycho-packaging-plugin
     								</artifactId>
     								<versionRange>
-    									[0.15.0,)
+    									[0.18.0,)
     								</versionRange>
     								<goals>
     									<goal>build-qualifier</goal>
@@ -73,7 +73,7 @@
     									tycho-compiler-plugin
     								</artifactId>
     								<versionRange>
-    									[0.15.0,)
+    									[0.18.0,)
     								</versionRange>
     								<goals>
     									<goal>compile</goal>