- Upgraded all npm packages to current stable version (package.json), closed #824

package.json

@@ -8,19 +8,19 @@
   "main": "index.php",
   "dependencies": {},
   "devDependencies": {
-    "ansi-colors": "^3.2.4",
+    "ansi-colors": "^4.1.1",
     "fancy-log": "^1.3.3",
     "file-extension": "^4.0.5",
     "flat": "^4.1.0",
-    "gulp": "next",
-    "gulp-brotli": "1.2.x",
+    "gulp": "^4.0.2",
+    "gulp-brotli": "^1.2.2",
     "gulp-bytediff": "1.0.x",
-    "gulp-clean-css": "^4.0.0",
+    "gulp-clean-css": "^4.2.0",
     "gulp-compass": "2.1.x",
     "gulp-debug": "^4.0.0",
-    "gulp-filter": "5.1.x",
+    "gulp-filter": "^6.0.0",
     "gulp-gzip": "1.x.x",
-    "gulp-if": "2.0.x",
+    "gulp-if": "^3.0.0",
     "gulp-jshint": "2.1.x",
     "gulp-rename": "^1.4.0",
     "gulp-requirejs-optimize": "1.3.x",
@@ -30,9 +30,9 @@
     "jshint-stylish": "^2.x.x",
     "lodash.padend": "4.6.x",
     "node-notifier": "^5.4.0",
-    "pretty-bytes": "^5.1.0",
+    "pretty-bytes": "^5.3.0",
     "promised-del": "1.0.x",
-    "slash": "2.x.x",
+    "slash": "^3.0.0",
     "terminal-table": "0.0.x",
     "uglify-es": "^3.0.x"
   },