system requirements: macOS 10.15 and later
Improvements
- Keep detached character inspectors even after the parent document is closed.
- Detect syntax style from the file extension also case-insensitively.
- Update R syntax style.
- [non-AppStore ver.] Reduce the application size.
- [dev] Update Yams from 4.0.4 to 4.0.6.
- [dev] Update the build environment to Xcode 12.5.