Update Cargo.toml

[nokome]

First, thanks for tree-sitter-sql, I've just started using it.

This PR, expand the semver range for tree-sitter in Cargo.toml. Using this exampled range avoids the Rust compiler error,

expected struct `tree_sitter::Language`, found a different struct `tree_sitter::Language`
perhaps two different versions of crate `tree_sitter` are being used?

which is encountered when using this crate alongside other tree sitter crates e.g. tree-sitter-python, tree-sitter-javascript and tree-sitter-typescript. The range is consistent with the range used in those crates e.g. https://github.com/tree-sitter/tree-sitter-python/blob/master/Cargo.toml).

I have submitted a similar PR here https://github.com/tree-sitter/tree-sitter-bash/pull/117 and at least for that repo, others have the same issue when using multliple tree-sitter-* crates together: https://github.com/tree-sitter/tree-sitter-bash/pull/120.