Support for "date" type

[pvgoran]

OpenAPI supports the date format for the string type, but tinyspec doesn't have a corresponding type. It would be great to have it. (I would even go as far as redefining the d shorthand type to the new date type, and defining the new dt shorthand for the existing datetime type.)

P. S. I'm very new to the world of REST API specifications, but tinyspec already looks like a useful "source" language for OpenAPI, an attractive alternative to just writing these verbose specifications by hand.

[Ajaxy]

@pvgoran Thanks for the report. I think we can add the date type, without a shorthand, to not break the current API.

[pvgoran]

For some reason (lack of releases on github? very few issues created?), I assumed that the project might be too young to worry about breaking existing usage. However, now I see that the history goes back to year 2017, so such breaking changes shouldn't be done.

[Ajaxy]

Merged, thank you, @pvgoran!