Allow to unregister a route

[PetrHeinz]

There was no nice way in the current way of registering routes to disable a certain method.

You need to override the whole route config to eg. disallow POST:

base config:

slim:
  routes:
    'app':
      'some-slug':
        get:
          service: SomeService
          middlewares: [...someMiddlewares]
        post:
          service: SomeService
          middlewares: [...someMiddlewares]

overriding config:

slim:
  routes:
    'app':
      'some-slug!':
        get:
          service: SomeService
          middlewares: [...someMiddlewares]

This leads to repetition and if the base middleware config were to change, you would need to change it in all overriding configs (leading to mistakes).

Imo it should be possible to provide an empty array to disable a route:

suggested overriding config:

slim:
  routes:
    'app':
      'some-slug':
        post!: