Bump oj from 3.13.17 to 3.13.19

Bumps [oj](https://github.com/ohler55/oj) from 3.13.17 to 3.13.19.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ohler55/oj/compare/v3.13.17...v3.13.19)

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

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

Gemfile.lock

@@ -335,7 +335,7 @@ GEM
       nenv (~> 0.1)
       shellany (~> 0.0)
     oauth (0.5.8)
-    oj (3.13.17)
+    oj (3.13.19)
     omniauth (2.1.0)
       hashie (>= 3.4.6)
       rack (>= 2.2.3)