chore(package): update jest-cli to version 21.1.0

Closes #18

Author: greenkeeper[bot]

package.json

@@ -42,7 +42,7 @@
         "git-labelmaker": "^0.9.0",
         "github-username": "^4.1.0",
         "jest": "^20.0.4",
-        "jest-cli": "^20.0.4",
+        "jest-cli": "^21.1.0",
         "js-yaml": "^3.8.4",
         "nsp": "^2.6.3",
         "semantic-release": "^6.3.2",