Fix author field format in package.json

Signed-off-by: Matthew Peveler <[email protected]>

Author: MasterOdin

package.json

@@ -2,7 +2,10 @@
   "name": "portfinder",
   "description": "A simple tool to find an open port on the current machine",
   "version": "1.0.37",
-  "author": "Charlie Robbins <[email protected]>, Erik Trom <[email protected]>",
+  "author": "Charlie Robbins <[email protected]>",
+  "contributors": [
+    "Erik Trom <[email protected]>"
+  ],
   "repository": {
     "type": "git",
     "url": "[email protected]:http-party/node-portfinder.git"