Add github repo to sandpack

Author: CompuIves

packages/sandpack/package.json

@@ -15,7 +15,7 @@
   "author": "Ives van Hoorne <[email protected]>",
   "repository": {
     "type": "git",
-    "url": ""
+    "url": "https://github.com/CompuIves/codesandbox-client/tree/master/packages/sandpack"
   },
   "engines": {
     "node": ">=6.0.0"