[blueocean-core] Swap from gulp-clean to del (#584)

gulp-clean is deprecated in favor of using del, swap to del. This has the
nice side effect of removing a few dependencies as del was already a
dependency of another package

blueocean-core-js/gulpfile.js

@@ -10,7 +10,7 @@ const babel = require('gulp-babel');
 const less = require('gulp-less');
 const rename = require('gulp-rename');
 const copy = require('gulp-copy');
-const clean = require('gulp-clean');
+const del = require('del');
 const runSequence = require('run-sequence');
 const lint = require('gulp-eslint');
 const Karma = require('karma').Server;
@@ -60,8 +60,7 @@ gulp.task("clean-build", () =>
 // Clean
 
 gulp.task("clean", () =>
-    gulp.src(config.clean, {read: false})
-        .pipe(clean()));
+    del(config.clean));
 
 // Testing
 

blueocean-core-js/package.json

@@ -50,11 +50,11 @@
     "babelify": "7.3.0",
     "browserify": "13.1.0",
     "chai": "3.5.0",
+    "del": "2.2.2",
     "enzyme": "2.4.1",
     "eslint-plugin-react": "6.3.0",
     "gulp": "3.9.1",
     "gulp-babel": "6.1.2",
-    "gulp-clean": "0.3.2",
     "gulp-copy": "0.0.2",
     "gulp-eslint": "3.0.1",
     "gulp-less": "3.1.0",