fix(package): update commander to version 2.14.1

Closes #65

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "async": "^2.0.1",
     "chalk": "2.3.0",
     "basic-auth": "2.0.0",
-    "commander": "2.12.2",
+    "commander": "2.14.1",
     "cross-spawn": "5.1.0",
     "download-github-repo": "0.1.3",
     "dssrv-prerender": "1.3.5",