Updated package.json.

Author: justinkames

package.json

@@ -23,7 +23,7 @@
     "babel-cli": "6.24.1",
     "babel-core": "6.25.0",
     "babel-loader": "7.1.1",
-    "babel-preset-es2015": "6.24.1"
+    "babel-preset-es2015": "6.24.1",
     "chai": "4.1.0",
     "codecov": "2.2.0",
     "istanbul": "0.4.5",