Replace preset-es2015 by preset-env

Author: xD3VHAX

package-lock.json

@@ -146,7 +146,6 @@
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-polyfill": "^6.26.0",
     "babel-preset-env": "^1.6.1",
-    "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
     "babel-register": "^6.26.0",
     "body-parser": "^1.18.2",