chore(package): update child-process-promise to version 2.2.0 (#856)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -28,7 +28,7 @@
     "@types/node": "6.0.41",
     "@types/pty.js": "0.2.31",
     "@types/react": "0.14.37",
-    "child-process-promise": "2.1.3",
+    "child-process-promise": "2.2.0",
     "dirStat": "0.0.2",
     "font-awesome": "4.6.3",
     "fs-extra": "0.30.0",