Use shared browserslist config

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

.babelrc

     [
       "@babel/preset-env",
       {
-        "modules": false,
-        "targets": {
-          "browsers": [
-            "last 2 versions",
-            "ie >= 11"
-          ]
-        }
+        "modules": false
       }
     ]
   ]

package-lock.json

         "node-releases": "^1.1.19"
       }
     },
+    "browserslist-config-nextcloud": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/browserslist-config-nextcloud/-/browserslist-config-nextcloud-0.0.1.tgz",
+      "integrity": "sha512-BUpPPPfE42jL2puSqfnsoOMoz6g+jqznoaoZmig4Kx1ULApBmM6iH+/7V1yblQz2PsOp39HET1byAB3h3h+kew==",
+      "dev": true
+    },
     "buffer": {
       "version": "4.9.1",
       "resolved": "http://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
     },
     "minimist": {
       "version": "0.0.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+      "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
       "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
     },
     "mississippi": {

package.json

     "@babel/preset-env": "^7.4.5",
     "babel-loader": "^8.0.6",
     "babel-plugin-transform-es2015-arrow-functions": "^6.22.0",
+    "browserslist-config-nextcloud": "0.0.1",
     "css-loader": "^2.1.1",
     "exports-loader": "^0.7.0",
     "file-loader": "^4.0.0",
     "webpack": "^4.34.0",
     "webpack-cli": "^3.3.3",
     "webpack-merge": "^4.2.1"
-  }
+  },
+  "browserslist": [
+    "extends browserslist-config-nextcloud"
+  ]
 }