Update devServer.options to take an array as well as a string to make it consistent with the underlying library, open

https://www.npmjs.com/package/open

Author: dangreenisrael

lib/options.json

@@ -198,6 +198,12 @@
         },
         {
           "type": "boolean"
+        },
+        {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
         }
       ]
     },

lib/utils/status.js

@@ -46,7 +46,7 @@ function status(uri, options, log, useColor) {
     let openOptions = {};
     let openMessage = 'Unable to open browser';
 
-    if (typeof options.open === 'string') {
+    if (typeof options.open === 'string' || Array.isArray(options.open)) {
       openOptions = { app: options.open };
       openMessage += `: ${options.open}`;
     }