Bump pytest-tornasync from 0.6.0 to 0.6.0.post2 (#149)

Bumps [pytest-tornasync](https://github.com/eukaryote/pytest-tornasync) from 0.6.0 to 0.6.0.post2.
- [Release notes](https://github.com/eukaryote/pytest-tornasync/releases)
- [Changelog](https://github.com/eukaryote/pytest-tornasync/blob/master/CHANGES.rst)
- [Commits](https://github.com/eukaryote/pytest-tornasync/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -2,7 +2,7 @@ async-generator==1.10; python_version>="3.6"
 codacy-coverage==1.3.11
 mock==3.0.5
 pytest-cov==2.8.1
-pytest-tornasync==0.6.0; python_version >= '3.5'
+pytest-tornasync==0.6.0.post2; python_version >= '3.5'
 pytest-trio==0.5.2; python_version>="3.6"
 pytest==4.6.6; python_version<"3.5"
 pytest==5.2.2; python_version>="3.5"