Version 1.21.1 New features: * Test new 'parsed' fixtures Bug fixes: * Ask for the correct `request` fixture Project/release management fixes and updates: * Move unit tests to separate directory * Add project URLs * Get rid of conftest.py * Move coverage options to pytest invocation * Split extras for dev and test scenarios * Make PyPI render long_description as Markdown * Declare support for Python 3.10 * Add tox config for testing against multiple Pythons * Remove unnecessary entry from `.gitignore` * Switch to PEP517-enabled build Documentation fixes: * Update release instructions * Fix typo in documentation * Fix link in documentation * Update project documentation