Release v2.2.1
Release v2.2.1

### Fixed
- Allow subbook that don't have honmon file(Kojien v4,v5)(#71)
- Unicodemap: handle alternative ascii character properly(#73)

### Added
- UnicodeMap: simple constructor and map getter(#72)

### Changed
- UnicodeMap: handle narrow and wide alternative code(#73)

### Deleted
- Bundled Unno unicode map.(#73)

Signed-off-by: Hiroshi Miura <ff6fb3ed059786151e736af13627c08d24e9f922@linux.com>

eb4j/eb4j