Road to v2

[buren]

• [ ] Optimize for Ruby 3.0, 2.7 is EOL March 31, 2023 so should still be supported in v2 (in my opinion)
• [ ] Handle rate limiting HTTP 429, see #32.
• [ ] Report functionality
  • [ ] --report flag with CSV output for the CLI
  • [ ] Return some report object when used in Ruby
• [ ] Go for backwards compatibility, might do some breaking chances if the API would be significantly improved
• [ ] Perhaps support other archiving services, like archive.is
• [ ] Proper configuration with configure block, WaybackArchiver.configure { |c| ... } instead of using top-level functions like WaybackArchiver.user_agent= (current configuration)
• [ ] ... and more

Happy for any input!