🐛 Fix null default branch/private fields

[laurentsimon]

The repository.private and repository.default_branch are null when the action is triggered by a schedule trigger.
I think this is a bug and I've created a support issue on GitHub to ask.

There is another field master_branch but it may be deprecated in the future so I would like to avoid it.

To fix the issue, I'm querying a REST API instead, which seems more reliable.

closes #73

[laurentsimon]

@ChrisCarini please verify that this fixes the problem. Use uses: laurentsimon/scorecard-action@bug/defaultbranch temporarily.

I'll push the changes/new version one you've confirmed.

Thanks for your patience!

[azeemshaikh38]

@ChrisCarini please verify that this fixes the problem. Use uses: laurentsimon/scorecard-action@bug/defaultbranch temporarily.

I'll push the changes/new version one you've confirmed.

Thanks for your patience!

We need to find a better way to do integration tests. Could we prioritize it for this quarter?

[laurentsimon]

@ChrisCarini please verify that this fixes the problem. Use uses: laurentsimon/scorecard-action@bug/defaultbranch temporarily.
I'll push the changes/new version one you've confirmed.
Thanks for your patience!

We need to find a better way to do integration tests. Could we prioritize it for this quarter?

yes, I totally agree. @naveensrinivasan and I will chat next week. There's some low-hanging fruit we can do in the next couple weeks. I'll create an issue with a list of tests we can start with and that should give us good coverage.

[ChrisCarini]

LGTM! Just a suggestion to reduce the calls - please consider accepting the suggestion into this PR! 😄

Brief testing notes below:

1. Switched workflow to use @laurentsimon 's bug branch (commit ref)
2. Observe results
   1. push workflow execution: ✅ Success (ref)
   2. workflow_dispatch workflow execution for master branch (default branch of this repo): ✅ Success (ref)
   3. workflow_dispatch workflow execution for addIconDir branch (non-default branch): ✅ Failure (expected; non-default branch not supported per failure message) (ref)