Update toml_edit requirement from 0.21.0 to 0.22.12

Updates the requirements on [toml_edit](https://github.com/toml-rs/toml) to permit the latest version.
- [Commits](toml-rs/toml@v0.21.0...v0.22.12)

---
updated-dependencies:
- dependency-name: toml_edit
  dependency-type: direct:production
...

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

rstest_test/Cargo.toml

@@ -16,7 +16,7 @@ version = "0.11.0"
 
 [dependencies]
 regex = "1.5.6"
-toml_edit = "0.21.0"
+toml_edit = "0.22.12"
 
 [dev-dependencies]
 lazy_static = "1.4.0"