Bump package.json version to 1.2.0
Bump package.json version to 1.2.0

A 1.0.0 tag was added 6 months ago, but we never updated package.json.  Bump the current master to 1.2.0 reflecting the API jumps since then.
unhangout/unhangout,unhangout/unhangout,unhangout/unhangout,unhangout/unhangout