Bump pytest from 5.4.1 to 5.4.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.1 to 5.4.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.4.1...5.4.2)

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

Author: dependabot-preview[bot]

poetry.lock

@@ -24,7 +24,7 @@ zeroconf = ">=0.24.5,<0.27.0"
 cbor2 = "^5.1.0"
 
 [tool.poetry.dev-dependencies]
-pytest = "^5.2"
+pytest = "^5.4"
 black = {version = "^19.10b0",allow-prereleases = true}
 pytest-cov = "^2.8.1"
 numpy = "^1.18.2"