Bump tycho version to 0.18.1

Signed-off-by: Fred Bricon <fbricon@gmail.com>
diff --git a/pom.xml b/pom.xml
index 3c7350b..43dc18b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -36,7 +36,7 @@
 
     <m2e-maven-runtime.version>${project.version}</m2e-maven-runtime.version>
 
-    <tycho-version>0.17.0</tycho-version>
+    <tycho-version>0.18.1</tycho-version>
     <tycho-extras-version>${tycho-version}</tycho-extras-version>
 
     <!-- eclipse version m2e is built against -->