Move pytest options from tox.ini to pyproject.toml

This way, if we execute %pytest instead of %tox in the Fedora/ELN package,
the options are respected.

pytest version 6.0 added support for pyproject.toml config, so require pytest>=6.
https://docs.pytest.org/en/7.1.x/reference/customize.html#pyproject-toml

Author: hroncok

pyproject.toml

@@ -2,6 +2,12 @@
 requires = ["setuptools>=40.8.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
+[tool.pytest.ini_options]
+addopts = "-v"
+testpaths = [
+    "test.py",
+]
+
 [tool.black]
 line-length = 79
 target-version = ['py36', 'py37', 'py38']

tox.ini

@@ -5,9 +5,9 @@ isolated_build = True
 [testenv]
 commands =
     python -m platform
-    pytest -v {posargs} test.py
+    pytest {posargs}
 deps =
-    pytest
+    pytest>=6
 
 [testenv:black]
 deps=black