Update the treesitter version to 0.20.0

[VarLad]

I did commend on this in the 'project status' issue Some new editors now work with tree-sitter 0.20.0 release and using this version of tree-sitter-julia there isn't feasible in my experience. I did try bumping the version in Cargo.toml to try with a an editor but that broke some stuff. How much work would it take to port tree-sitter-julia to tree-sitter 0.20.0?

[clason]

You need to be much more specific; this parser works perfectly fine in Neovim, which uses the latest tree-sitter 0.20.6?

[VarLad]

@clason I'm trying to implement it for the Lapce editor, while using this parser and the highlight queries from nvim-treesitter repo. I had to bump the version for the Rust binding to 0.20 to make it compile. It does work but the behavior is that it treats function calls and a bunch of other stuff as a variable when highlighting which made me think if there was something wrong with just bumping the version of tree-sitter in Cargo.toml and using nvim queries