build(deps): bump gatsby from 5.13.1 to 5.13.3 (#55)

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 5.13.1 to 5.13.3.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/compare/gatsby@5.13.1...gatsby@5.13.3)

---
updated-dependencies:
- dependency-name: gatsby
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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