[7.0] Change server Property type in CheckClientCredentialForAnyScope

[alshf89]

I change declaration $server property in CheckClientCredentialForAnyScope from private to protected, this is useful if anyone wants to extends this middleware.

[driesvints]

Unfortunately this is a breaking change if anyone is overwriting the property: https://3v4l.org/i7s5h

Edit: but I sincerely doubt it that anyone is doing that 🤷‍♂

[alshf89]

I think if someone wants to overwrite the property they must use another name and use dependency injection and service container to assign League\OAuth2\Server\ResourceServer object to that property.

and why should they overwrite it when they can access it from parent class ?

Actually I wanted to extend my custom middleware with CheckClientCredentialForAnyScope and needed server Property to do something in my extended middleware. but I cant cuz it is private.

currently I can extend CheckClientCredential middleware because it has protected server property.