Make struct base public to allow creation of custom dialects

[sharpner]

trafficstars

Is there any reason to make base private?

[mantenie]

:+1:

[coocood]

You can just copy and paste the code in base to create custom dialects.

[coocood]

Well, I took a look at it again, it doesn't work. I made those structs and functions private to avoid breaking the API when I refactor the code. I think the best way to create your custom dialect is to fork the repo.