Contributing docs don't work

Cloning this repo and then attempting to run the example will fail.

It turns out the .yarnrc file is preventing Yarn from doing anything, by aliasing the normal yarn to nothing. So remove the file and you can execute the yarn commands properly.

Then you'll need to make the change mentioned in the other open issue about android not building of updating the location for Maven for bing maps.

Then you update the types file as mentioned in the second open issue.

Then you add the key as mentioned in the readme, or use the one checked into this repo.