changed abandoned github module to active one

Author: Jane Quinn

github.js

@@ -1,7 +1,7 @@
 'use strict'
 
-var GitHub = require('github')
-var github = new GitHub({version: '3.0.0'})
+var GitHub = require('github4')
+var github = new GitHub()
 var Request = require('request')
 var _ = require('lodash')
 var gitUrl

package.json

@@ -31,7 +31,7 @@
   "license": "MIT",
   "dependencies": {
     "eraro": "0.4.1",
-    "github": "0.2.2",
+    "github4": "0.5.4",
     "lodash": "4.6.1",
     "request": "2.69.0",
     "seneca": "2.0.0",