chore(package): update babel-jest to version 23.0.0

Closes #30

Author: greenkeeper[bot]

package.json

@@ -19,7 +19,7 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "babel-jest": "22.0.0",
+    "babel-jest": "23.0.0",
     "babel-polyfill": "^6.16.0",
     "babel-preset-es2015": "^6.18.0",
     "babel-preset-es2015-rollup": "^3.0.0",