Run CI on Node 7; Bump detect-port: 1.0.1 -> 1.1.0 (react#1776) (react#1783)

* Run CI on Node 7

* Bump detect-port: 1.0.1 -> 1.1.0

* Run AppVeyor CI on Node 7

Author: ryanwalters

package.json

@@ -35,7 +35,7 @@
     "connect-history-api-fallback": "1.3.0",
     "cross-spawn": "4.0.2",
     "css-loader": "0.26.2",
-    "detect-port": "1.0.1",
+    "detect-port": "1.1.0",
     "dotenv": "2.0.0",
     "eslint": "3.16.1",
     "eslint-config-react-app": "^0.6.1",