Online-judge-tools

- [675](https://github.com/kmyk/online-judge-tools/pull/675) snip side-by-side diff display if result is long
- [676](https://github.com/kmyk/online-judge-tools/pull/676) `download` command support yukicoder token ([beet-aizu](https://github.com/beet-aizu))
- [671](https://github.com/kmyk/online-judge-tools/pull/671) support latest library checker
- [665](https://github.com/kmyk/online-judge-tools/pull/665) `test` support side-by-side diff display

- [665](https://github.com/kmyk/online-judge-tools/pull/665) add Sphere Online Judge support
- [661](https://github.com/kmyk/online-judge-tools/pull/661) allow `submit` to guess more languages ([eggplants](https://github.com/eggplants))
- [660](https://github.com/kmyk/online-judge-tools/pull/660) prevent installation using unsupported versions of Python

- [654](https://github.com/kmyk/online-judge-tools/pull/654) fix a bug of git pull option about Library Checker
- [653](https://github.com/kmyk/online-judge-tools/pull/653) add CodeChef support
- [649](https://github.com/kmyk/online-judge-tools/pull/649) allow `submit` to guess Common Lisp and Clojure files by the extension [fukamachi](https://github.com/fukamachi)

- [643](https://github.com/kmyk/online-judge-tools/pull/643) make efficient about Library Checker
- [645](https://github.com/kmyk/online-judge-tools/pull/645) recognize URLs of spare servers of Codeforces like [m1.codeforces.com](http://m1.codeforces.com/)
- [636](https://github.com/kmyk/online-judge-tools/pull/636) provide internal functions about sessions as a library

- [630](https://github.com/kmyk/online-judge-tools/pull/630) update the User-Agent for HackerRank
- [628](https://github.com/kmyk/online-judge-tools/pull/628) improve the samples parser for AtCoder
- [627](https://github.com/kmyk/online-judge-tools/pull/627) parse HTML in AOJ when no samples are registered in the official API
- [626](https://github.com/kmyk/online-judge-tools/pull/626) raise errors when no samples are found
- [613](https://github.com/kmyk/online-judge-tools/pull/613) fix the issue of `test` subcommand with non-Unicode outputs

- [kawacchu](https://github.com/kawacchu) (AtCoder: [kawacchu](https://atcoder.jp/users/kawacchu)) joined as a maintainer :tada:
- [584](https://github.com/kmyk/online-judge-tools/pull/584) add `--judge-command` option to `test` with special judge ([btk15049](https://github.com/btk15049))
- [609](https://github.com/kmyk/online-judge-tools/issues/609) fix an issue about sizes of terminals on CI environments (reported by [yosupo06](https://github.com/yosupo06))
- [624](https://github.com/kmyk/online-judge-tools/pull/624) add an internal method `LibraryCheckerProblem.download_checker_cpp()`
- [616](https://github.com/kmyk/online-judge-tools/pull/616) [#619](https://github.com/kmyk/online-judge-tools/pull/619) [#620](https://github.com/kmyk/online-judge-tools/pull/620) fix some bugs on AtCoder