Use PSR-11 instead of container-interop

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PSR-11 has now been officially released.

It is recommended to remove the container-interop/container-interop dependency in favor of psr/container.

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An FYI: this will result in heavy changes for dependent packages.

The namespace for psr/container 's ContainerInterface is different from container-interop/container-interop's ContainerInterface. Fortunately, the API remains the same.