Fixed #707 Replaced var with const and let and added strict mode (#712)
Fixed #707 Replaced var with const and let and added strict mode (#712)

* Fixed #707 Replaced var with const and let and added strict mode

* Fixed src/fs-watcher.js and changed remaining var to let

* Changed src/fs-watcher.js file to use const instead of let at line 52 and 57

filerjs/filer,humphd/filer,humphd/filer,filerjs/filer