chore(deps-dev): bump pytest from 5.3.5 to 5.4.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.3.5 to 5.4.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.3.5...5.4.1)

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

Author: dependabot-preview[bot]

poetry.lock

@@ -32,7 +32,7 @@ sphinx = { version = ">=1.8,<3.0", optional = true }
 toml = { version = "^0.10.0", optional = true }
 
 [tool.poetry.dev-dependencies]
-pytest = "^5.3"
+pytest = "^5.4"
 hypothesis = "^5.1"
 isort = "^4.3"
 flake8 = "^3.7"