Update geo requirement from 0.30.0 to 0.31.0

Updates the requirements on [geo](https://github.com/georust/geo) to permit the latest version.
- [Changelog](https://github.com/georust/geo/blob/main/CHANGES.md)
- [Commits](georust/geo@geo-0.30.0...geo-0.31.0)

---
updated-dependencies:
- dependency-name: geo
  dependency-version: 0.31.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.toml

@@ -13,7 +13,7 @@ edition = "2021"
 
 [dependencies]
 libc = "0.2.174"
-geo = "0.30.0"
+geo = "0.31.0"
 geo-types = "0.7.13"
 num-traits = "0.2.19"