Fix check for default branch on received webhook, allowing for a custom one

[dottxado]

Description

Add the filter to customize the branch to elaborate when a webhook is received. Since most of the logic is common between the handlers, it has been extracted to the Base class.

Add the repository name to the existing filter to allow resolving the project inside the filter.

How has this been tested?

I tested this feature locally with some limitations. I tested sending a webhook, and I can see the request is going through without errors.

Types of changes

Bug fix (non-breaking change which fixes an issue)
Fixes #280

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code has proper inline documentation.

[codecov]

Codecov Report

❌ Patch coverage is 95.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.72%. Comparing base (9ee3c19) to head (5e39df7).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
inc/Loader/Git.php	0.00%	1 Missing ⚠️
inc/WebhookHandler/GitHub.php	90.90%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #281      +/-   ##
============================================
+ Coverage     72.35%   72.72%   +0.37%     
- Complexity      410      414       +4     
============================================
  Files            28       28              
  Lines          1248     1265      +17     
============================================
+ Hits            903      920      +17     
  Misses          345      345              

Flag	Coverage Δ
feature	12.33% <0.00%> (-0.17%)	⬇️
php	65.60% <95.00%> (+0.47%)	⬆️

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[dottxado]

Hello @ocean90 👋
Sorry for the ping....did you have the chance to review this? 🙇

[swissspidy]

Looks like some unit tests need updating.

After that I need to defer to @ocean90 for review.

[dottxado]

Hi there 👋
The PR is ready for your review @ocean90: I fixed an issue, and the tests 🙇

[dottxado]

Oooops sorry, I didn't notice the code sniffer error!