revert the chages which migrates terminal library from nsf/termbox-go…

… to gdamore/tcell (ktr0731#47)

Merge pull request ktr0731#36 from tjmtmmnk/backspace-ignore-cursor

Backspace ignored cursor position

Merge pull request ktr0731#35 from ktr0731/introduce-goreleaser

introduce GoReleaser

Merge pull request ktr0731#18 from ktr0731/revert-to-use-termbox-go

use nsf/termbox-go instead of gdamore/tcell because of avoiding a bug

Merge pull request ktr0731#7 from ktr0731/hotreload

Hot reload support

Merge pull request ktr0731#4 from martinbaillie/clear-state

Add state clearing function

filter when f.state.input is modified

modify benchmark tests