feat: add additional configuration option

[ganhammar]

Resolves #567

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Before the change?

• Currently, it's only possible to configure GitHubWebhooksOptions using a static value, at least through the extension method

After the change?

• With this PR, another configuration option has been added that allows to configure GitHubWebhooksOptions through an IConfiguration instance

Pull request checklist

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

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[github-actions]

👋 Hi! Thank you for this contribution! Just to let you know, our GitHub SDK team does a round of issue and PR reviews twice a week, every Monday and Friday! We have a process in place for prioritizing and responding to your input. Because you are a part of this community please feel free to comment, add to, or pick up any issues/PRs that are labeled with Status: Up for grabs. You & others like you are the reason all of this works! So thank you & happy coding! 🚀

[nickfloyd]

Hety @ganhammar Thanks for the changes here! ❤️ It would be awesome to get some tests in here as well if / when you have time.

[ganhammar]

Hey @nickfloyd!

I have added a new test project for Octokit.Webhooks.AzureFunctions and tests covering the added extension method and the one that already existed. Let me know if any additional changes is needed 🙂

[ganhammar]

Any interest of this PR or should I close it? 😊

[nickfloyd]

Any interest of this PR or should I close it? 😊

We definitely have interest in this. Thank you for the efforts. We're just a bit behind on cycling through all of the reviews across Octokit. We'll need to retrigger ci to get things verified, once that's done we should be able to ✅ and merge your changes in.