Bump skylight from 5.3.3 to 5.3.4

Bumps [skylight](https://github.com/skylightio/skylight-ruby) from 5.3.3 to 5.3.4.
- [Release notes](https://github.com/skylightio/skylight-ruby/releases)
- [Changelog](https://github.com/skylightio/skylight-ruby/blob/master/CHANGELOG.md)
- [Commits](skylightio/skylight-ruby@v5.3.3...v5.3.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -397,7 +397,7 @@ GEM
       tilt (~> 2.0)
     sitemap_generator (6.1.2)
       builder (~> 3.0)
-    skylight (5.3.3)
+    skylight (5.3.4)
       activesupport (>= 5.2.0)
     slim (4.1.0)
       temple (>= 0.7.6, < 0.9)