cargo-mutants 1.2.3

• New --error option, to cause functions returning Result to be mutated to return the specified error.

• New --no-config option, to disable reading .cargo/mutants.toml.

• Mutate functions returning String to String::new() rather than "".into(): same result but a bit more idiomatic.

• New --leak-dirs option, for debugging cargo-mutants.

• Update to syn 2.0, adding support for new Rust syntax.

• Minimum supported Rust version increased to 1.65 due to changes in dependencies.