Support positional arguments for dataclasses

[dmontagu]

It looks like arguments to pydantic dataclasses are treated as keyword-only, but actually the arguments to dataclasses are always positional (whether it is a pydantic dataclass or a built-in dataclass).

I generally prefer to drop the keywords when using dataclasses since it results in shorter calls, and I can be confident the ordering is right since the creation is happening in my own code.

[koxudaxi]

@dmontagu

Thank you for creating these issues.
I have fixed it, and It will be released next version.

BTW, I discuss to support pydantic dataclasses by PyCharm with JetBrains developer.
They will support it as an extra entry point for the third party dataclasess library.
It means we will not need to support dataclass on this plugin. Of course, I will continue to support useful autocompletion.
If I catch the result then, I will tell it to you and other people on pydantic issues.

[koxudaxi]

It was merged.