Some more work on refactoring

package.json

@@ -29,10 +29,9 @@
     "test": "npm exec -- karma start --log-level debug --single-run=true"
   },
   "devDependencies": {
-    "eslint": "^6.8.0",
-    "jscs": "^3.0.7",
+    "jscs": "^2.1.1",
     "jshint": "^2.11.0",
-    "karma": "^4.4.1",
+    "karma": "^6.4.2",
     "karma-chrome-launcher": "^3.1.0",
     "karma-firefox-launcher": "^1.3.0",
     "karma-qunit": "^4.0.0",
@@ -41,6 +40,7 @@
     "qunit": "^2.9.3",
     "qunit-assert-close": "^2.1.2",
     "syn": "^0.14.1",
-    "terser": "^4.6.7"
+    "terser": "^4.6.7",
+    "eslint": "^8.56.0"
   }
 }