chore(package): update babel-jest to version 22.0.0

Closes #25

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "babel": "^6.23.0",
     "babel-cli": "^6.24.0",
     "babel-eslint": "^7.2.1",
-    "babel-jest": "^19.0.0",
+    "babel-jest": "^22.0.0",
     "babel-plugin-transform-builtin-extend": "^1.1.2",
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-polyfill": "^6.23.0",