multipart/formdata では文字列しか送れないっぽい？

* Twemojiで合字に対応

* split emoji regex

* Fix: url download

* not explicitly close on end

* resolve on stream finish

* remove unnecessary code

* reject on file error

Updates the requirements on [file-type](https://github.com/sindresorhus/file-type) to permit the latest version.
- [Release notes](https://github.com/sindresorhus/file-type/releases)
- [Commits](https://github.com/sindresorhus/file-type/commits/v10.4.0

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Updates the requirements on [webpack](https://github.com/webpack/webpack) to permit the latest version.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/commits/v4.25.1

)

Signed-off-by: dependabot[bot] <support@dependabot.com>