Update to PSR-11 for lazy listener support

[weierophinney]

Q	A
Documentation	no
Bugfix	no
BC Break	no
New Feature	yes
RFC	no
QA	no

Description

This patch does the following:

• Bumps to PHP 7.4. This is necessary, as PSR-11 from 1.1 forward requires PHP 7.4.
• Switches from suggesting container-interop to suggesting PSR-11 directly, and allowing either v1 or v2 releases.
• Updates the various classes implementing lazy listeners to typehints against the PSR-11 ContainerInterface instead of the container-interop equivalent. This can be done because container-interop from v1.2 forward extended the PSR-11 interfaces; as such, this is type widening, which is allowed within PHP.

The impetus for this change is the laminas-servicemanager 3.11.0 release, which now makes container-interop into class aliases of PSR-11.

[Ocramius]

Do we want to hold off until psr/container:^2 actually works in laminas/laminas-servicemanager?

[weierophinney]

Do we want to hold off until psr/container:^2 actually works in laminas/laminas-servicemanager?

No, because we have both v1 and v2 support in this AND it's opt-in anyways.

Additionally they'll get a conflict if they try and install laminas-servicemanager AND psr/container v2 at the same time anyways. But once laminas-servicemanager supports psr/container v2, this will just work.

[weierophinney]

@boesing I've updated to conflict with container-interop < 1.2.