Possible to disable client_secret_basic for token_endpoint_auth_methods_supported?

[jits]

Hi, thanks for developing this library. It's super useful in setting up an OIDC server as part of a platform.

Is it possible to disable client_secret_basic as an option for token_endpoint_auth_methods_supported? I see that it's hardcoded in the controller:

doorkeeper-openid_connect/app/controllers/doorkeeper/openid_connect/discovery_controller.rb

Line 48 in 69828cb

token_endpoint_auth_methods_supported: %w[client_secret_basic client_secret_post],

– has there been some consideration in making this configurable?

I'm happy to submit a PR to support this.