chore(deps): update rustc-hash requirement from 1.1 to 2.0 (#177)

Updates the requirements on [rustc-hash](https://github.com/rust-lang/rustc-hash) to permit the latest version.
- [Changelog](https://github.com/rust-lang/rustc-hash/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/rustc-hash/commits)

---
updated-dependencies:
- dependency-name: rustc-hash
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -26,7 +26,7 @@ nom = "7.1"
 postgres = { version = "0.19", features = ["with-chrono-0_4"] }
 quick_cache = "0.5"
 regex = "1.7"
-rustc-hash = "1.1"
+rustc-hash = "2.0"
 seqrepo = { version = "0.10.2", features = ["cached"] }
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }