Add support for the private space sydney

[drusellers]

Closes #109

[drusellers]

bump

[drusellers]

add support for dublin now too

[mathias]

Hello! Have you tried https://github.com/heroku/heroku-cli-addons-admin ? Kensa is mostly deprecated, and I'd like to close this PR if the new CLI plugin works for you.

[drusellers]

@mathias hello, we currently use kensa to validate our own internal API and that it is correctly respecting the contract of Heroku. These new commands are quite nice, and we look to integrate this into our CI flow but it doesn't help us with the correction around API calls. Does that make sense?

[mathias]

Hello @drusellers ,

Yes, the new plugin doesn't have any testing built in. We found that we could not maintain integration testing for every way that add-ons can be used, with the Platform API for Partners and new features like async provisioning, etc.

Instead, we ask that add-on partners write their own integration tests into their codebase's test suite based on our Dev Center docs.