Online-judge-tools

- [839](https://github.com/online-judge-tools/oj/pull/839) improve the error messages about updating packages ([granddaifuku](https://github.com/granddaifuku))

- [833](https://github.com/online-judge-tools/oj/pull/833)
- add aliases `--hack-actual` and `--hack-expected` for `--hack` option of `generate-input` subcommand
- make `generate-input` subcommand print warnings when the given input generator doesn't generate random input cases
- improve `--help` messages

- [816](https://github.com/online-judge-tools/oj/pull/816) (breaking changes) remove Python 3.5 support
- [811](https://github.com/online-judge-tools/oj/pull/811) [#790](https://github.com/online-judge-tools/oj/pull/790) (breaking changes) update the `test` subcommand
- `--print-input` is now default.
- `--ignore-spaces` option and `--ignore-spaces-and-newlines` option are added.
- Now it always ignores the difference between CRLF and LF.
- Some options are renamed or removed.
- The current default behavior uses exact matching but ignores the difference of CRLF and LF.
- The previous default used exact matching but ignored trailing spaces and newlines of files. It was the same to the matching algorithm in Anarchy Golf.
- [819](https://github.com/online-judge-tools/oj/pull/819) (breaking changes) remove some options from `submit`
- The options `--format-dos2unix`, `--format-rstrip`, `--golf` are removed. They are options for code golf.
- [821](https://github.com/online-judge-tools/oj/pull/821) replace the default command of `test` subcommand on Windows with `.\a.exe`
- [818](https://github.com/online-judge-tools/oj/pull/818) improve the output of `test` subcommand
- [813](https://github.com/online-judge-tools/oj/pull/813) [#819](https://github.com/online-judge-tools/oj/pull/819) update some hint messages
- [825](https://github.com/online-judge-tools/oj/pull/825) (breaking changes) change to print logs to stdout instead of stderr ([ryo-n](https://github.com/ryo-n))
- `--json` options of some subcommands are also removed. They used stdout.

- [144](https://github.com/online-judge-tools/api-client/pull/144) add CodeChef support again

- [139](https://github.com/online-judge-tools/api-client/pull/139) support downloading system cases from AtCoder (helped by [qryxip](https://github.com/qryxip))

- [133](https://github.com/online-judge-tools/api-client/pull/133) allow [old.yosupo.jp](https://old.yosupo.jp/) as URLs for Library-Checker problems
- [134](https://github.com/online-judge-tools/api-client/pull/134) support virtual contests of [AtCoder Problems](https://kenkoooo.com/atcoder)
- [135](https://github.com/online-judge-tools/api-client/pull/135) update about `get-contest` subcommand; support yukicoder contests