SQLiteral db driver 4.0.0 is here

I'll give this a go. I have several multithreaded web projects that could benefit from this, and I've been considering switching to a better SQLite lib for a while

SQLiteral db driver 4.0.0 is here

What a better way to celebrate the Nim 2.0 release than to upgrade projects to use it, and bring some improvements along the way! Most notably, this version allows unlimited amount of threads, so it should play nicely with web servers than can juggle non-trival amounts of threads, like, say, Gui