chore(package): update jest to version 22.1.0

Closes #17

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
         "generator-travis": "^1.5.2",
         "git-labelmaker": "^0.9.0",
         "github-username": "^4.1.0",
-        "jest": "^20.0.4",
+        "jest": "^22.1.0",
         "jest-cli": "^20.0.4",
         "js-yaml": "^3.8.4",
         "nsp": "^2.6.3",