chore: bump delegate from 0.12.0 to 0.13.1

Bumps [delegate](https://github.com/kobzol/rust-delegate) from 0.12.0 to 0.13.1.
- [Changelog](https://github.com/Kobzol/rust-delegate/blob/main/CHANGELOG.md)
- [Commits](Kobzol/rust-delegate@v0.12.0...v0.13.1)

---
updated-dependencies:
- dependency-name: delegate
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -29,7 +29,7 @@ serde = {version = "1.0.203", features = ["derive"], optional = true}
 serde_json = {version = "1.0.120", optional = true}
 bincode = {version = "1.3.1", optional = true}
 tskit-derive = {version = "0.2.0", path = "tskit-derive", optional = true}
-delegate = "0.12.0"
+delegate = "0.13.1"
 
 [dev-dependencies]
 anyhow = {version = "1.0.86"}