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.

Ran setup.py develop.