Bump parallel from 1.26.2 to 1.26.3

Bumps [parallel](https://github.com/grosser/parallel) from 1.26.2 to 1.26.3.
- [Commits](grosser/parallel@v1.26.2...v1.26.3)

---
updated-dependencies:
- dependency-name: parallel
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -19,7 +19,7 @@ GEM
       childprocess (>= 0.6.3, < 6)
       iniparse (~> 1.4)
       rexml (~> 3.2)
-    parallel (1.26.2)
+    parallel (1.26.3)
     parser (3.3.4.2)
       ast (~> 2.4.1)
       racc