Bump flake8-pyi from 18.3.1 to 19.2.0

Bumps [flake8-pyi](https://github.com/ambv/flake8-pyi) from 18.3.1 to 19.2.0.
- [Release notes](https://github.com/ambv/flake8-pyi/releases)
- [Commits](PyCQA/flake8-pyi@18.3.1...19.2.0)

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

Author: dependabot-support

poetry.lock

@@ -39,7 +39,7 @@ typing-extensions = "^3.7"
 mypy = "^0.670"
 wemake-python-styleguide = "^0.7.0"
 flake8-pytest = "^1.3"
-flake8-pyi = "^18.3"
+flake8-pyi = "^19.2"
 
 safety = "^1.8"