v1.2.0

🎉 Support manual package maintenance

Including construction, inspection, and publishing to PyPI.
Please refer to steps 6 through 8 in README.md file.

🔄 Change

• setup.py: keep a minimal setting to ensure editable installation supported
• README.md: finish full pipeline of package development.
• requirements.txt: add more example dependencies.
• ruff.toml: target-version set to "py37", cause it is the minimum requirement.

🌟 Add

• setup.cfg: define the configuration of the build process
• packaging.sh: auto build the distribution packages.
• check_meta.sh: auto check the meta information of the built distribution packages.