python-txaio-18.8.1-bp154.1.39

- Add patch to build with newer pytest releases:
  * pytest4.patch

- Set pytest maximum version.

- Fix invocation of test suite, previously silently not running
- Add missing runtime dependencies
- Update to v18.8.1
  * add API to support cancellation; this means passing a 1-argument
    callable to ``create_future`` and ``txaio.cancel`` to actually
    cancel a future
  * support Python 3.7 (CI / testing added)
- from v18.7.1
  * move to calver
  * deprecate Python 3.3 support and CI testing
- from v2.10.0
  * the asyncio version of ``make_logger`` now deduces a proper
    namespace instead of using the root

- Remove superfluous devel dependency for noarch package