Add full-width space width adjustment process

bump up to v2.0.0-beta5

Improve GSUB and GPOS table deletion process

Add HEAVY CHECK MARK (U+2714) for docker, etc.

fix x position probrem in italic, Latin characters use IBM Plex Mono,…

… improved logic to reduce scale

add logic to make eaaw half-width

fix powerline glyphs

fix 0u3000 (zenkaku space)

Bump up to v1.6.0

Bump up to v1.5.0