bump x.y.z versions to even 'y' prior to creation of 3_4 branch

git-svn-id: file:///home/git/hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/RMassBank@122710 bc3139a8-67e5-0310-9ffc-ced21a209358

DESCRIPTION

 Package: RMassBank
 Type: Package
 Title: Workflow to process tandem MS files and build MassBank records
-Version: 2.1.0
+Version: 2.2.0
 Authors@R: c(
     person(given = "RMassBank at Eawag", email = "massbank@eawag.ch",
     role=c("cre")),