Bump pytest-mypy-plugins from 1.1.0 to 1.2.0 (#213)

Bumps [pytest-mypy-plugins](https://github.com/mkurnikov/pytest-mypy-plugins) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/mkurnikov/pytest-mypy-plugins/releases)
- [Changelog](https://github.com/mkurnikov/pytest-mypy-plugins/blob/master/release.xsh)
- [Commits](https://github.com/mkurnikov/pytest-mypy-plugins/commits)

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

Author: dependabot-preview[bot]

poetry.lock

@@ -60,7 +60,7 @@ pytest = "^5.3"
 pytest-cov = "^2.8"
 pytest-randomly = "^3.1"
 pytest-asyncio = "^0.10.0"
-pytest-mypy-plugins = "^1.1"
+pytest-mypy-plugins = "^1.2"
 
 sphinx = "^2.3"
 sphinx-autodoc-typehints = "^1.10"