chore: bump iniconfig from 1.1.1 to 2.0.0 in /tests

Bumps [iniconfig](https://github.com/pytest-dev/iniconfig) from 1.1.1 to 2.0.0.
- [Release notes](https://github.com/pytest-dev/iniconfig/releases)
- [Changelog](https://github.com/pytest-dev/iniconfig/blob/main/CHANGELOG)
- [Commits](https://github.com/pytest-dev/iniconfig/compare/v1.1.1...v2.0.0)

---
updated-dependencies:
- dependency-name: iniconfig
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tests/requirements_py3.txt

@@ -6,7 +6,7 @@ chardet==5.1.0
 cryptography==39.0.1
 filelock==3.9.0
 idna==3.4
-iniconfig==1.1.1
+iniconfig==2.0.0
 invoke==2.0.0
 packaging==23.0
 pathlib2==2.3.7.post1