v1.2.0-RC1

This release contains the following typo and bug fixes:

• Update in light of annotations refactor. (#191)
  • Use immutable getAnnotations in FirrtlTerpBackend (#189)
• Bump sbt to 1.1.1. (#190)
• Fix use of bare Bundle in MemPokeSpec. (#186)
• Replace deprecated usage: '!=' and 'Vec()'. (#187)
• Support Invalidate API (#182)