This change adds the new dependencies for `tree-sitter` and `tree-sitter-language-pack`. These are pinned to exact versions. `tree-sitter`'s API is still in a bit of flux, and they shipped some breaking changes between 0.24 and 0.25, so I'm not confident in specifying any kind of range. For `tree-sitter-language-pack`, we'll probably always need to pin an exact version, because the queries and the grammars need to be compatible or else the queries won't load at all. Note that there is one bug fix that I submitted for the tree-sitter package which has not yet been released. I'll bump the dependency once that happens. Testing Done: Ran setup.py develop.