build(deps): update deadpool-diesel requirement from 0.5.0 to 0.6.0

Updates the requirements on [deadpool-diesel](https://github.com/bikeshedder/deadpool) to permit the latest version.
- [Changelog](https://github.com/bikeshedder/deadpool/blob/master/CHANGELOG.md)
- [Commits](bikeshedder/deadpool@deadpool-diesel-v0.5.0...deadpool-diesel-v0.6.0)

---
updated-dependencies:
- dependency-name: deadpool-diesel
  dependency-type: direct:production
...

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

src/public/Cargo.toml

@@ -69,7 +69,7 @@ features = ["derive"]
 path = "../common"
 
 [dependencies.deadpool-diesel]
-version = "0.5.0"
+version = "0.6.0"
 features = ["postgres", "serde"]
 
 [dependencies.diesel]