New firmware release v1.2.0 with new versioning

[koron]

I created a new release for Keyball firmware v1.2.0
v1.2.0 uses QMK 0.22.x which is supported by newer Remap

I changed versioning rule: unified versioning for all keyboards, instead of versioning each keyboards.
Subsequent releases will include zip archives of firmware for each keyboards.
Each zip file contains multiple keymap firmwares for a keyboard.

[Yowkees]

非常に長時間にわたり、Keyballファームウェア修正にご尽力いただき本当にありがとうございます！
Keyball界がだんだん巨大になってファームウェアへの期待も大きくなっており、ご協力は本当に心強い限りです。
本当にありがとうございます！