Bump grunt-wp-i18n from 1.0.3 to 1.0.4

Bumps [grunt-wp-i18n](https://github.com/cedaro/grunt-wp-i18n) from 1.0.3 to 1.0.4.
- [Changelog](https://github.com/cedaro/grunt-wp-i18n/blob/develop/CHANGELOG.md)
- [Commits](cedaro/grunt-wp-i18n@v1.0.3...v1.0.4)

---
updated-dependencies:
- dependency-name: grunt-wp-i18n
  dependency-version: 1.0.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]