Add checks mode input

[Ugzuzg]

Closes #73

Uses the approach suggested in the issue itself.

[GrantBirki]

@Ugzuzg Have you tested out all these changes in a project somewhere and confirmed that it is working as expected?

[GrantBirki]

@Ugzuzg I don't think this quite works. Here is how I tested for you to replicate:

1. I set checks: required in my Actions config. I confirmed this setting was enabled by viewing my Actions logs

2. I created a required CI check on my pull request

   

3. I attempted to deploy that branch

4. The deployment failed even though the only failing CI check was one that was not required

   

[Ugzuzg]

Thanks for pointing that out! Here's the working version: https://github.com/Ugzuzg/actions-sandbox/pull/2

I didn't notice that checks needed to be manually read and passed to the function.

[GrantBirki]

@Ugzuzg your changes are live in the following pre-release! Go ahead and give it a try and I'll make it the latest release within the next week for the public to use 🎉

https://github.com/github/branch-deploy/releases/tag/v9.1.0