Remove git+ from repository.url (#448)

Provenance requires https:// than git+https://. We are removing git+ so provenance will work automatically.

Author: compulim

package.json

@@ -21,7 +21,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/Microsoft/BotFramework-DirectLineJS.git"
+    "url": "https://github.com/Microsoft/BotFramework-DirectLineJS.git"
   },
   "author": "Microsoft Corporation",
   "license": "MIT",