update `react-tools` to `0.12.1`
update `react-tools` to `0.12.1`

In version `0.11.1` will case an `Unexpected token <` problem。
Dakuan/gulp-jest,M6Web/gulp-jest,james-hart/gulp-jest,alansouzati/gulp-jest,daspecster/gulp-jest-iojs,abiee/gulp-jest,ncuillery/gulp-jest