fix unit tests, use qunit-puppeteer for es6 support

package.json

@@ -24,6 +24,12 @@
     "node": ">=9.0.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.8.7",
+    "@babel/preset-env": "^7.8.7",
+    "babel-eslint": "^10.1.0",
+    "colors": "^1.4.0",
+    "express": "^4.17.1",
+    "glob": "^7.1.6",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^7.0.1",
     "gulp-babel": "^8.0.0",
@@ -31,19 +37,16 @@
     "gulp-connect": "^5.7.0",
     "gulp-eslint": "^6.0.0",
     "gulp-header": "^2.0.9",
-    "gulp-qunit": "^2.1.1",
     "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.0.2",
+    "gulp-tap": "^2.0.0",
     "gulp-uglify": "^3.0.2",
     "gulp-zip": "^5.0.1",
-    "express": "^4.17.1",
     "mustache": "^4.0.0",
+    "node-qunit-puppeteer": "^2.0.1",
     "socket.io": "^2.3.0",
-    "yargs": "^15.1.0",
     "webpack-stream": "^5.2.1",
-    "babel-eslint": "^10.1.0",
-    "@babel/core": "^7.8.7",
-    "@babel/preset-env": "^7.8.7"
+    "yargs": "^15.1.0"
   },
   "eslintConfig": {
     "env": {