Bump tree-sitter version and deal with arising issues

[heitor-lassarote]

This MR changes the commit used in the tree-sitter/vendor/tree-sitter directory to a more recent commit.

After this, a problem popped up where compilation would fail on ts_parser_halt_on_error, so this foreign import was removed.

There were some broken symlinks that were causing Stack to not be able to clone the project as well, so they were removed.

[jtojnar]

The ts_parser_halt_on_error symbol has been removed in https://github.com/tree-sitter/tree-sitter/commit/7de36a33eba1a911118623e5b5c51ada99ae17d3.