Update backend webpack & babel

backend/package.json

@@ -12,16 +12,16 @@
   "author": "",
   "license": "ISC",
   "devDependencies": {
-    "@babel/core": "^7.12.10",
-    "@babel/preset-env": "^7.12.10",
+    "@babel/core": "^7.14.3",
+    "@babel/preset-env": "^7.14.4",
     "babel-loader": "^8.2.2",
     "clean-webpack-plugin": "^3.0.0",
     "copy-webpack-plugin": "^7.0.0",
     "dotenv-webpack": "^7.0.2",
     "transform-loader": "^0.2.4",
-    "webpack": "^5.10.0",
-    "webpack-cli": "^4.2.0",
-    "webpack-dev-server": "^3.11.0"
+    "webpack": "^5.38.1",
+    "webpack-cli": "^4.7.0",
+    "webpack-dev-server": "^3.11.2"
   },
   "dependencies": {
     "btoa": "^1.2.1",