Merge pull request #3 from lim-yoona/docs/update_README

update README: Add explain for safetcpack

Merge pull request #2 from lim-yoona/feat/provide_thread-safe_packager

feat: provide a thread-safe packager

update examples and go.mod

change package name from 'msgpack' to 'tcpack'

Update release.yml

update msgpack

Update release.yml

Update LICENSE

add example for using msgpack