Update sealed requirement from 0.5 to 0.6

Updates the requirements on [sealed](https://github.com/jmg-duarte/sealed-rs) to permit the latest version.
- [Commits](jmg-duarte/sealed-rs@0.6.0-rc1...0.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -16,4 +16,4 @@ include = ["/src/", "/CHANGELOG.md", "/LICENSE.md", "/README.md"]
 
 [dependencies]
 derive_more = { version = "1.0", features = ["as_ref", "display"] }
-sealed = "0.5"
+sealed = "0.6"