Edition 2021

Supported by every toolchain that we support, and doesn't actually require any changes to the codebase.

Author: sourcefrog

Cargo.toml

@@ -7,7 +7,7 @@ repository = "https://github.com/gitpatch-rs/gitpatch"
 readme = "README.md"
 keywords = ["patch", "diff", "parse", "nom"]
 license = "MIT"
-edition = "2018"
+edition = "2021"
 rust-version = "1.63" # matches .github/workflows/checks.yml
 
 [dependencies]