chore: bump yargs-parser and signcode (electron#521)

Bumps [yargs-parser](https://github.com/yargs/yargs-parser) to 21.1.1 and updates ancestor dependency [signcode](https://github.com/kevinsawicki/signcode). These dependencies need to be updated together.


Updates `yargs-parser` from 13.1.1 to 21.1.1
- [Release notes](https://github.com/yargs/yargs-parser/releases)
- [Changelog](https://github.com/yargs/yargs-parser/blob/main/CHANGELOG.md)
- [Commits](yargs/yargs-parser@v13.1.1...yargs-parser-v21.1.1)

Updates `signcode` from 0.5.0 to 1.0.0
- [Release notes](https://github.com/kevinsawicki/signcode/releases)
- [Commits](kevinsawicki/signcode@v0.5.0...v1.0.0)

---
updated-dependencies:
- dependency-name: yargs-parser
  dependency-type: indirect
- dependency-name: signcode
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]