bump y of x.y.z version number for BioC 2.12 release

git-svn-id: file:///home/git/hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/RMassBank@75263 bc3139a8-67e5-0310-9ffc-ced21a209358

DESCRIPTION

 Package: RMassBank
 Type: Package
 Title: Workflow to process tandem MS files and build MassBank records
-Version: 1.1.1
+Version: 1.2.0
 Author: Michael Stravs, Emma Schymanski
 Maintainer: Michael Stravs, Emma Schymanski <massbank@eawag.ch>
 Description: Workflow to process tandem MS files and build MassBank records.