chore(package): update babel-preset-env to version 1.4.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
     "ava": "^0.19.0",
     "babel-cli": "^6.23.0",
     "babel-polyfill": "^6.23.0",
-    "babel-preset-env": "^1.3.3",
+    "babel-preset-env": "^1.4.0",
     "codeclimate-test-reporter": "^0.4.1",
     "coveralls": "^2.11.16",
     "esdoc": "^0.5.2",