Update react-i18next requirement from ^16.2.1 to ^16.3.3 in /src-editor

Updates the requirements on [react-i18next](https://github.com/i18next/react-i18next) to permit the latest version.
- [Changelog](https://github.com/i18next/react-i18next/blob/master/CHANGELOG.md)
- [Commits](i18next/react-i18next@v16.2.1...v16.3.3)

---
updated-dependencies:
- dependency-name: react-i18next
  dependency-version: 16.3.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]