chore(package): update babel-plugin-transform-runtime to version 6.6.0
chore(package): update babel-plugin-transform-runtime to version 6.6.0

http://greenkeeper.io/
leancloud/js-realtime-sdk,leeyeh/js-realtime-sdk,leeyeh/js-realtime-sdk,leeyeh/js-realtime-sdk,leancloud/js-realtime-sdk