build(deps): bump loader-utils from 2.0.2 to 2.0.3 in /react-plus-golang

Bumps [loader-utils](https://github.com/webpack/loader-utils) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v2.0.3/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v2.0.2...v2.0.3

)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
...

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