Set the minimum supported Rust version to 1.61.1. Technically it's not needed as the bump is only needed for the temp-env dev dependency. Nonetheless is 1.62.1 not that new anymore, hence I'm bumping the version so that we don't need to special case the version for testing.
Also fix all Clippy warnings that were introduced in the new Rust version.
Set the minimum supported Rust version to 1.61.1. Technically it's not needed as the bump is only needed for the
temp-envdev dependency. Nonetheless is 1.62.1 not that new anymore, hence I'm bumping the version so that we don't need to special case the version for testing.Also fix all Clippy warnings that were introduced in the new Rust version.