chore(package): update babel-jest to version 22.4.4

Closes #9

Author: greenkeeper[bot]

package.json

@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "babel-core": "^6.26.0",
-    "babel-jest": "^21.0.0",
+    "babel-jest": "^22.4.4",
     "babel-loader": "^7.1.2",
     "babel-plugin-transform-async-to-generator": "^6.24.1",
     "babel-polyfill": "^6.26.0",