Update derive-new requirement from 0.5.8 to 0.6.0

Updates the requirements on [derive-new](https://github.com/nrc/derive-new) to permit the latest version.
- [Commits](https://github.com/nrc/derive-new/commits)

---
updated-dependencies:
- dependency-name: derive-new
  dependency-type: direct:production
...

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

Cargo.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 description = "PHP serialization format support"
 
 [dependencies]
-derive-new = "0.5.8"
+derive-new = "0.6.0"
 derive_more = "0.99.5"
 getset = "0.1.0"