Update package.json
Update package.json

Version updated as per [1.7.2](https://github.com/bower/bower/releases/tag/v1.7.2) release.
rlugojr/bower,rajzshkr/bower,Blackbaud-EricSlater/bower,prometheansacrifice/bower,Jinkwon/naver-bower-cli,bower/bower,thinkxl/bower