Enable Draft4 "type" keyword

[laurynasr]

Models with "nullable" were failing to validate against OpenAPI 3.0 schemas because the standard "type" keyword was being used. Aded the Draft4TypeKeyword to SchemaKeywordRegistry in Draft4Support.Enable().

[gregsdennis]

Thanks for this. Probably just something I missed.

Could you bump the version in the .csproj file:

<Version>0.2.1</Version>
<FileVersion>0.2.1.0</FileVersion>
<AssemblyVersion>0.2.1.0</AssemblyVersion>

And... it doesn't look like I have release notes 🤦, so I guess that's fine.

(Also, I'd be happy to know how/where you're using the lib!)

[gregsdennis]

Pinging @laurynasr

[laurynasr]

Sorry for missing the initial reply, I probably need to get my notifications in check.
Pushed a change to bump the versions as asked.

We're using Azure API Management as API gateway, which only supports OpenAPI 3.0 -- so we're using this library in our internal tooling to validate the schemas of our APIs, and samples/requests/responses against those schemas.

[gregsdennis]

Glad someone found it useful!

Thanks for the update. I'll merge when the build finishes.