Update geo-svg requirement from 0.5.0 to 0.6.0

Updates the requirements on [geo-svg](https://github.com/georust/geo-svg) to permit the latest version.
- [Release notes](https://github.com/georust/geo-svg/releases)
- [Commits](https://github.com/georust/geo-svg/commits/v0.6.0)

---
updated-dependencies:
- dependency-name: geo-svg
  dependency-type: direct:production
...

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

Cargo.toml

@@ -22,5 +22,5 @@ serde = { version = "1.0.99", features = ["derive"] }
 serde_json = "1.0.40"
 once_cell = "1.4.0"
 data-uri-utils = "0.2.0"
-geo-svg = "0.5.0"
+geo-svg = "0.6.0"
 geo-types = "0.7.1"