Rename failOnError => failAfterError because gulp-eslint new version.
Add '!node_modules/**' so gulp ignore node_modules directory in lint task (ESLint ignores files with "node_modules" paths, but as mention in gulp-eslint it's best to have gulp ignore the directory as well).
If this PR will be accepted I think we can close #859
failOnError=>failAfterErrorbecause gulp-eslint new version.'!node_modules/**'so gulp ignorenode_modulesdirectory inlinttask (ESLintignores files with "node_modules" paths, but as mention in gulp-eslint it's best to have gulp ignore the directory as well).If this PR will be accepted I think we can close #859