v0.2.0

main updates:

• dca3576 code.tests>new: add test case for Tagmark.count_github_url
• f5c4bb6 docs>new: add new section into CONTRIBUTING
• 54a19bc code.misc>new: add sub command "checktag"
• c07d897 code.core>modify.style: add support for utf-8 encoding in output jsonlines file
• 5199240 code.misc>new: Tagmark.get_github_repo_infos add condition filter
• 112eeda code.misc>new: add msg to show rate of process in convert command
• a72d352 code.misc>modify.refactor: change defualt value of "checktag -c", and some help message modify
• 73df5f8 code.misc>new: add sub command "autotagdef"
• 4438d16 code.tool>modify.new: add output file log info into convertsubcommand
• 745bcfc docs>new: add new content into README
• 609bc56 infra.build>modify.new: bump requests from 2.28.2 to 2.31.0 to fix security vul reported by github dependabot