Add helper class for creating web hooks

[hnrkndrssn]

Introducing NewRepositoryWebHook, a new strongly typed class that derives from the existing NewRepositoryHook class but adds properties and constructor parameters for config settings that should be passed to the API when creating a new web hook. These settings are merged with the config settings that are specific to the web service the web hook will be interacting with (as per https://api.github.com/hooks).

Fixes #914

[haacked]

Currently there are 2 constructors, one that takes the required (name, config and url) parameters and defaults the optional (contentType, secret and insecureSsl) parameters and one that takes all parameters.

Funny you should mention this. I just submitted a PR that includes some guidelines around our model objects. https://github.com/octokit/octokit.net/blob/consolidate-committer-info/Octokit/Models/README.md

For request objects (such as this), I think optional parameters should simply be read/write properties and required parameters are read only and go in the constructor. Does that make sense?

[hnrkndrssn]

👍 will update PR tonight

[hnrkndrssn]

NewRepositoryWebHook now conforms to the model request guidelines of required properties are added as ctor parameters with read-only properties and optional properties are added as read-write properties.

Also added a method, ToRequest(), that merges the passed in config object with the webhook specific config properties that is used when passing the object to the API.

Failing test is the known StopsMakingNewRequestsWhenTakeIsFulfilled.

[haacked]

/wether/whether

[hnrkndrssn]

We now throw an exception with a more helpful message if the user has added any webhook specific config values to the config parameter in the ctor.

Come to think of it, I need to do a bit of refactoring to clean this up a bit...

[hnrkndrssn]

I think this is now done, just awaiting the ✅ of approval from AppVeyor

[shiftkey]

Looks like there's a csproj merge conflict here 😢

[hnrkndrssn]

crap, totally missed your comment... 😞 will try and fix it up as soon as possible.

[hnrkndrssn]

OK, merge conflicts sorted, now just waiting for AppVeyor

[shiftkey]

I don't think that second build is ever going to complete, so I'm gonna merge this in.

Thanks again @alfhenrik!

[hnrkndrssn]

👍