CB-12762 : point package.json repo items to github mirrors instead of apache repos site

 This closes #36
diff --git a/package.json b/package.json
index f2c9f83..2f9549b 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "repository": {
     "type": "git",
-    "url": "https://git-wip-us.apache.org/repos/asf/cordova-plugin-wkwebview-engine.git"
+    "url": "https://github.com/apache/cordova-plugin-wkwebview-engine"
   },
   "bugs": {
     "url": "https://issues.apache.org/jira/browse/CB"