chore(package): update babel-preset-env to version 1.5.2

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "ava": "^0.19.1",
     "babel-cli": "^6.24.1",
     "babel-polyfill": "^6.23.0",
-    "babel-preset-env": "^1.4.0",
+    "babel-preset-env": "^1.5.2",
     "codeclimate-test-reporter": "^0.4.1",
     "coveralls": "^2.13.1",
     "esdoc": "^0.5.2",