Parser derive macro triggers forbidden-lint-groups lint

[Byter09]

Hello,

in the process of upgrading our CI to use the latest Rust toolchain (1.55.0), we've encountered an error originating from this crate.

It seems that the lint forbidden-lint-groups has been updated with this release, and thus does not allow clippy::all anymore.

As a hotfix, we've added #![allow(forbidden_lint_groups)] to the beginning of the file, as we can't apply it to the derive.

Given, that this is a hard error in the future, we're hoping that this issue will notify you of this upcoming change and speed up resolving this problem.

Here's the error:

error: allow(clippy::all) incompatible with previous forbid
   --> <censored>/src/gherkin.rs:304:10
    |
304 | #[derive(Parser)]
    |          ^^^^^^ overruled by previous forbid
    |
    = note: `-D forbidden-lint-groups` implied by `-D future-incompatible`
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #81670 <https://github.com/rust-lang/rust/issues/81670>
    = note: `forbid` lint level was set on command line
    = note: this error originates in the derive macro `Parser` (in Nightly builds, run with -Z macro-backtrace for more info)

And the related code:

#[derive(Parser)]
#[grammar = "gherkin.pest"]
struct GherkinParser;

Thanks.