chore(package): update jest to version 22.0.3

Closes #106

package.json

@@ -69,7 +69,7 @@
     "greenkeeper-lockfile": "^1.7.1",
     "husky": "^0.14.1",
     "identity-obj-proxy": "^3.0.0",
-    "jest": "^21.0.1",
+    "jest": "^22.0.3",
     "jest-cli": "^21.2.1",
     "node-sass": "^4.5.3",
     "postcss-scss": "^1.0.1",