Hey Jan,
Do you know where you saw the 2.2.0-SNAPSHOT in the pom files? I have been trying to get a more organized versioning process in place and I thought with the latest release I had cleaned all of that up.
Also, I already see the dependency you listed below in the web pom.xml file on the 2.2.0 tag.
If you are downloading a zip from github, make sure you switch to the 2.2.0 tag when you do it. If you are on the master branch when you click download, you will get a zip of the code from the master branch which does still have 2.2.0-SNAPSHOT as the version deliberately.
Steve T.