Update bower to ~1.2.7 because of these fixes:
Update bower to ~1.2.7 because of these fixes:

- Fix bower update not correctly catching up branch commits
- Fix bower not checking out a tag if it looks like a semver (e.g.: 1.0)
- Fix install & update commands printing the wrong versions in some cases

jifeon/bower-npm-install,apsavin/bower-npm-install,arikon/bower-npm-install