build(deps): update exon requirement from 0.13.0 to 0.14.0 (#111)

Updates the requirements on exon to permit the latest version.

---
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 = "50.0.0", features = ["pyarrow"] }
 datafusion = "36"
-exon = { version = "0.13.0", features = ["all"] }
+exon = { version = "0.14.0", features = ["all"] }
 pyo3 = "0.20"
 tokio = { version = "1", features = ["rt"] }