3.0.0

• (breaking) Drop gradle 5.0-5.2 support (minimum required gradle is 5.3)
• Add docker support (python could be started in docker container without local python)
  • Add dockerChown and dockerExec methods for python tasks for customizations in doFirst or doLast closures
• Add requirements file support (requirements.txt).
  • By default, requirements support is enabled in strict mode:
    plugin reads file contents and expects only exact version matches (allows extracting module declarations
    so external tools could easily parse and update dependencies).
  • In non-strict mode, requirements file processing delegated to pip (no restrictions on declarations)
  • New configuration section: python.requirements
• Add global python binary validation to reveal PATH problems (might not be the same as user shell PATH)
  • Add validateSystemBinary configuration to be able to disable validation (in case it would not work properly)
• Add cleanPython task for removing project-specific virtualenv
• Add python process output to exception message to be sure it will be visible on error (especially on CI)
• Fix potential memory leak due to gradle Project objects caching (#22)
• Fix concurrent virtualenv installation in multi-module project with parallel execution enabled (#19)
• Fix concurrent pipInstall into the same environment with parallel execution