Bump pytest from 4.4.0 to 4.4.1 (#56)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.4.0 to 4.4.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@4.4.0...4.4.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Pipfile

@@ -9,5 +9,5 @@ pyfxa = "==0.7.1"
 [dev-packages]
 flake8 = "==3.7.7"
 flake8-isort = "==2.7.0"
-pytest = "==4.4.0"
+pytest = "==4.4.1"
 pytest-mock = "==1.10.3"