Bump pytest-datadir from 1.3.1 to 1.4.1 (#1569)

Author: dependabot[bot]

requirements/requirements_dev.txt

@@ -14,7 +14,7 @@ pylint==2.12.2
 pytest==6.2.5
 pytest-black==0.3.12
 pytest-cov==3.0.0
-pytest-datadir==1.3.1
+pytest-datadir==1.4.1
 pytest-flake8==1.0.7
 pytest-mock==3.10.0
 pytest-pylint==0.18.0