chore(package): update nyc to version 9.0.1 (#444)
chore(package): update nyc to version 9.0.1 (#444)

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