Return confidence from OpenCage API

[Brammm]

We have a business case where we would need the accuracy/confidence from the providers we are using. This PR adds this for OpenCage.

[freyfogle]

HI @Brammm Ed from OpenCage here. Thanks for this change, I am all for it. But one thing for your project, because unfortunately many people get confused by our confidence value - I just want to make sure you understand it is not a measure of "correctness". It is "just" a measure of how large the result is. Please see the details in the API docs.

[Brammm]

Hey @freyfogle, thanks for that heads up, I really appreciate it. We're converting the OpenCage confidence to an generalized "accuracy" in our app, but for our use case, Confidence as defined does work (e.g. with Google Maps, we're using the location type).

[Brammm]

@jbelien Is there anything we can do to help to get this merged? For now, we're relying on a fork.

[Nyholm]

This looks good. Can you please rebase so the CI is running?

[jbelien]

@jbelien Is there anything we can do to help to get this merged? For now, we're relying on a fork.

Sorry for the wait ; looks good 👍
Could you rebase your PR to our master branch so I can approve and merge it? Thanks.

[Brammm]

@jbelien Donezo! Thanks for following up.