1.1.0 seems to be broken

[shadowhand]

Please see these tests:
https://travis-ci.org/zendframework/zend-stratigility/jobs/332049603#L644

So the problem is only on the latest release. It's because the interface extends PSR-15 interface and method defined in the PSR-15 interface typehint against PST-15 interface, not as before interop interface. Basically 1.1.0 has a BC Break...

Refs http-interop/http-server-handler#12 by @webimpress

[michalbundyra]

PR #5 seems to be a good solution !

[shadowhand]

PR #3 should be the correct fix.

[shadowhand]

Fixed by #5.

[michalbundyra]

@shadowhand it can be closed now, we have 1.1.1 in place ! Thanks 👍