[skip ci] Release v2.2.0.M6
diff --git a/gradle.properties b/gradle.properties
index bc7ec05..9dbf0d3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 title=Grails Testing Support
 authors=Jeff Brown,James Kleeh
-projectVersion=2.2.0-SNAPSHOT
+projectVersion=2.2.0.M6
 projectDesc=Support for writing concise expressive tests for Grails artifacts
 projectUrl=https://github.com/grails/grails-testing-support
 githubSlug=grails/grails-testing-support