Poetry 0.5.0 is out

This version brings some improvements and a bunch of bugfixes. Changes Hashes check when installing Whenever you install packages with poetry, they will be verified against the hashes present in the pyproject.lock file to increase security. Fixes Fixed handling of post releases. Fixed python restricted dependencies not being checked against virtualenv version. Fixed python/platform constraint not being picked up for subdependencies. Fixed skipped packages appearing as installing. Fixed platform specification not being used when resolving dependencies.