Support custom branch selection in webhook handlers

[dottxado]

The custom branch selection feature from PR #275 is not properly integrated into the webhook handlers, where the check on the received branch is still executed against the default_branch in the case of GitHub and GitLab:

traduttore/inc/WebhookHandler/GitHub.php

Lines 124 to 127 in 9ee3c19

	// We only care about the default branch but don't want to send an error still.
	if ( 'refs/heads/' . $params['repository']['default_branch'] !== $params['ref'] ) {
	return new WP_REST_Response( [ 'result' => 'Not the default branch' ] );
	}

traduttore/inc/WebhookHandler/GitLab.php

Lines 82 to 85 in 9ee3c19

	// We only care about the default branch but don't want to send an error still.
	if ( 'refs/heads/' . $params['project']['default_branch'] !== $params['ref'] ) {
	return new WP_REST_Response( [ 'result' => 'Not the default branch' ] );
	}

[lloc]

@ocean90 Can you give us a hand here too?

[ocean90]

@lloc Feel free to submit a PR which I can review.

[dottxado]

Hello @ocean90, I just opened a PR 😄 #281

[tyrann0us]

Hi @swissspidy, this is a continuation of #275, which did not include all occurrences where branch selection was hardcoded in Traduttore. Can we move the related PR #281 forward? Much appreciated. 🙂