Online-judge-tools

- [80](https://github.com/online-judge-tools/api-client/pull/80) revert the patch for RCPC tokens of Codeforces

- [78](https://github.com/online-judge-tools/api-client/pull/78) fix the issue of Codeforces partially using RCPC tokens (helped by [9kin](https://github.com/9kin))

- [74](https://github.com/online-judge-tools/api-client/pull/74) disable the login feature for Codeforces
- [58](https://github.com/online-judge-tools/api-client/pull/58) [breaking changes] remove deprecated APIs for yukicoder

- [71](https://github.com/online-judge-tools/api-client/pull/71) fix the login feature for yukicoder ([beet-aizu](https://github.com/beet-aizu))

- [63](https://github.com/online-judge-tools/api-client/pull/63) add `guess-language-id` subcommand as a utility
- [66](https://github.com/online-judge-tools/api-client/pull/66) print the version info for user support

- [806](https://github.com/online-judge-tools/oj/pull/806) fix a bug of `generate-input` subcommand about logging ([rsk0315](https://github.com/rsk0315))
- [807](https://github.com/online-judge-tools/oj/pull/807) fix a bug of `generate-input` subcommand which happens when generators failed