add dependency in package.json in order to build in node 4 (#1347)

ng2-components/ng2-alfresco-webscript/package.json

@@ -54,6 +54,7 @@
   "devDependencies": {
     "@types/jasmine": "^2.2.33",
     "@types/node": "^6.0.42",
+    "autoprefixer": "^6.5.4",
     "concurrently": "^2.2.0",
     "cpx": "^1.3.1",
     "cssnano": "^3.8.1",
@@ -72,6 +73,7 @@
     "gulp-template": "^4.0.0",
     "gulp-typescript": "^3.1.3",
     "gulp-uglify": "^2.0.0",
+    "gulp-util": "^3.0.7",
     "intl": "^1.2.5",
     "jasmine-ajax": "^3.2.0",
     "jasmine-core": "2.4.1",
@@ -84,6 +86,7 @@
     "karma-mocha-reporter": "^2.0.3",
     "license-check": "^1.0.4",
     "material-design-lite": "^1.1.3",
+    "merge-stream": "^1.0.1",
     "remap-istanbul": "^0.6.3",
     "rimraf": "2.5.2",
     "run-sequence": "^1.2.2",