Changelog
- d04f4ab Fix lanzou file list and check available domain (#13)
- 291dee4 chore: add proxy env support for telegram.
- 55c7c4d chore: create a better download progress.
- 5ea271c chore: trim the progress content size.
- 2379e4b feat: add tianlang book support.
- fbf022f fix: correctly exit download when meet errors.
- 42b4929 fix: remove the chan block in fetcher.
- 62a9a88 refactor: add log exit method.