chore(gulp): update gulp scripts

scripts/gulp/tasks/lint.ts

@@ -0,0 +1,25 @@
+import { task, src } from 'gulp';
+
+
+task('lint', ['lint.sass', 'lint.ts']);
+
+
+task('lint.ts', () => {
+  const tslint = require('gulp-tslint');
+  return src([
+      'src/**/*.ts'
+    ]).pipe(tslint())
+      .pipe(tslint.report('verbose'));
+});
+
+
+task('lint.sass', function() {
+  const scsslint = require('gulp-scss-lint');
+  return src([
+      'src/**/*.scss',
+      '!src/components/*/test/**/*',
+      '!src/util/test/*'
+    ])
+    .pipe(scsslint())
+    .pipe(scsslint.failReporter());
+});