* chore: Add the SPDX information to each file
Add copyright and licensing information as defined in version 3.0 of
the REUSE Specification.
* tweak format
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Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
* perf: use slacc on check-word-mute when all of specified words are single word
* perf: use slacc as possible
* build: avoid tarball
* chore: update slacc
* build: update package name
