* refactor(plugin): consolidate TOML config parsing
* test(plugin): verify env vars available during conftest imports
* Support pytest.toml and .pytest.toml
* feat(config): support [tool.pytest] in pyproject.toml
* feat(plugin): add U flag to unset env variables
* fix(config): use inipath for TOML file discovery
* feat(plugin): add .env file loading support
* Add support for 3.14 and drop 3.9
- Run the testsuite.