pyparted-3.12.0

• Adjust how PED_PARTITION types are added to _ped
• Add support for PARTITION_LINUX_HOME
• Actually, install 'six' using pip
• Do not use pip to install test dependencies
• Update GitHub Actions test to latest Fedora image
• Add units, devices, and partitions convenience dicts
• Update version number and required libparted version
• Correct PARTITION_* constant initialization
• setup.py: port to setuptools
• Fix some errors found by covscan while building on RHEL-8
• Add initial Github Actions CI support