Update import path of fsnotify
Update import path of fsnotify

Rename "gopkg.in/fsnotify.v1" to "github.com/fsnotify/fsnotify"
per upstream recommendation.

See https://github.com/fsnotify/fsnotify/issues/108 for rationale.

samt42/viper,vasu1124/viper,istio/viper,dvln/viper,spf13/viper,akutz/viper