Update skim requirement from 0.10 to 0.12

Updates the requirements on [skim](https://github.com/lotabout/skim) to permit the latest version.
- [Release notes](https://github.com/lotabout/skim/releases)
- [Changelog](https://github.com/skim-rs/skim/blob/master/CHANGELOG.md)
- [Commits](skim-rs/skim@v0.10.0...v0.12.0)

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

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

Cargo.toml

@@ -50,7 +50,7 @@ nix = { version = "0.29", default-features = false, features = [
     "term",
 ] }
 utf8parse = "0.2"
-skim = { version = "0.10", optional = true, default-features = false }
+skim = { version = "0.12", optional = true, default-features = false }
 signal-hook = { version = "0.3", optional = true, default-features = false }
 termios = { version = "0.3.3", optional = true }
 buffer-redux = { version = "1.0", optional = true, default-features = false }