build(deps): update exon requirement from 0.21.1 to 0.22.0 (#136)

Updates the requirements on [exon](https://github.com/wheretrue/exon) to permit the latest version.
- [Release notes](https://github.com/wheretrue/exon/releases)
- [Changelog](https://github.com/wheretrue/exon/blob/main/CHANGELOG.md)
- [Commits](wheretrue/exon@v0.21.1...v0.22.0)

---
updated-dependencies:
- dependency-name: exon
  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

@@ -10,7 +10,7 @@ name = "biobear"
 [dependencies]
 arrow = { version = "51.0.0", features = ["pyarrow"] }
 datafusion = "38"
-exon = { version = "0.21.1", features = ["default"] }
+exon = { version = "0.22.0", features = ["default"] }
 pyo3 = "0.20"
 tokio = { version = "1", features = ["rt"] }
 noodles = { version = "0.73", features = ["core"] }