v1.7.16

What's Changed

• Create test environment by @tsutaj in #146
• Fix CI job triggers by @tsutaj in #147
• Refactor setting files by @tsutaj in #144
• Fix docs typo: ignore_samples by @tsutaj in #151
• Run CI when PR is merged by @tsutaj in #152
• Remove obsoleted output files by @tsutaj in #153
• Refactor cache system by @tsutaj in #154
• Allow specifying digit separator on problem.toml by @tsutaj in #156

Full Changelog: v1.7.15...v1.7.16