fs@2.0.0-alpha.6

85f8419(#848) Fix DebouncedEvent type to correctly represent the actual type.
c601230(#847) Add createNew option for writeFile and writeTextFile to create the file if doesn’t exist and fail if it does.
c601230(#847) Truncate files when using writeFile and writeTextFile with append: false.
2e2fc8d(#857) Fix invalid args id for command unwatch error when trying to unwatch a previously watched file or directory.
c601230(#847) Fix panic when using writeFile or writeTextFile without passing an option object.