Set resolver = "3" in Cargo.toml

This should enable MSRV awareness without requiring a full 2024 Edition
update.

Author: featherbread

Cargo.toml

@@ -7,6 +7,7 @@ authors = ["Alex Hamlin <[email protected]>"]
 license = "MIT"
 edition = "2021"
 rust-version = "1.85.0"
+resolver = "3"
 categories = ["command-line-utilities"]
 keywords = ["cli"]
 exclude = ["benches/**"]