GitHub Verify should grant 'contributor' role for beta-access members who made any merged contribution

[Sekkmer]

currently members who are not part of developers or lead-developers do not get any role assigned to them:

			case 'member':
				if (teams.includes('lead-developers'))
					this._updateGitHubRole('lead-developer');
				else if (teams.includes('developers'))
					this._updateGitHubRole('developer');

				break;

if members without these roles made any contribution that is merged to master branch we could assign collaborator role just as we do for outside contributors