update package.json

Author: LesterLyu

package.json

@@ -34,15 +34,15 @@
   },
   "devDependencies": {
     "chai": "^4.2.0",
-    "coveralls": "^3.0.6",
+    "coveralls": "^3.0.9",
     "docdash": "^1.1.1",
-    "gh-pages": "^2.1.1",
+    "gh-pages": "^2.2.0",
     "jsdoc": "^3.6.3",
     "mocha": "^7.0.0",
     "nyc": "^15.0.0",
-    "terser-webpack-plugin": "^2.1.2",
-    "webpack": "^4.30.0",
-    "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-cli": "^3.3.0"
+    "terser-webpack-plugin": "^2.3.1",
+    "webpack": "^4.41.5",
+    "webpack-bundle-analyzer": "^3.6.0",
+    "webpack-cli": "^3.3.10"
   }
 }