Обновлен babel до версии 7

package.json

@@ -5,12 +5,12 @@
   "version": "1.0.0",
   "description": "Homepage",
   "devDependencies": {
+    "@babel/core": "^7.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.0.0",
+    "@babel/plugin-transform-runtime": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
     "autoprefixer": "^9.6.0",
-    "babel-core": "^6.26.3",
-    "babel-loader": "^7.1.5",
-    "babel-plugin-transform-class-properties": "^6.24.1",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-env": "^1.7.0",
+    "babel-loader": "^8.0.0",
     "css-loader": "^2.1.1",
     "glob": "^7.1.4",
     "mini-css-extract-plugin": "^0.6.0",