Add babel-jest

Author: tmcw

.babelrc

@@ -2,10 +2,5 @@
   "presets": ["flow"],
   "plugins": [
     "transform-es2015-modules-commonjs"
-  ],
-  "env": {
-    "test": {
-      "plugins": ["istanbul"]
-    }
-  }
+  ]
 }

package.json

@@ -60,6 +60,7 @@
     "are-we-flow-yet": "^1.0.0",
     "babel-cli": "^6.24.1",
     "babel-eslint": "^7.2.3",
+    "babel-jest": "^19.0.0",
     "babel-plugin-istanbul": "^4.1.3",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.24.1",
     "babel-preset-flow": "^6.23.0",