Update package.json
Update package.json

The current `homepage` is redirecting to http://facebook.github.io/react/.
That's annoying when using a tool like [npm-check](https://www.npmjs.com/package/npm-check) to check the change log.

reactjs/react-router,rafrex/react-router,goblortikus/react-router,stshort/react-router,aaron-goshine/react-router,goblortikus/react-router,tylermcginnis/react-router,ReactTraining/react-router,asaf/react-router,djkirby/react-router,shunitoh/react-router,shunitoh/react-router,goblortikus/react-router,d-oliveros/react-router,reactjs/react-router,tylermcginnis/react-router,asaf/react-router,ReactTraining/react-router,OpenGov/react-router,stshort/react-router,OpenGov/react-router,goblortikus/react-router,djkirby/react-router,nvartolomei/react-router,asaf/react-router,rackt/react-router,DelvarWorld/react-router,ReactTraining/react-router,OpenGov/react-router,aaron-goshine/react-router,rafrex/react-router,nvartolomei/react-router,DelvarWorld/react-router,rackt/react-router,d-oliveros/react-router,ReactTraining/react-router,OpenGov/react-router