Bump parallel from 1.24.0 to 1.26.3

Bumps [parallel](https://github.com/grosser/parallel) from 1.24.0 to 1.26.3.
- [Commits](grosser/parallel@v1.24.0...v1.26.3)

---
updated-dependencies:
- dependency-name: parallel
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -365,7 +365,7 @@ GEM
     open4 (1.3.4)
     options (2.3.2)
     orm_adapter (0.5.0)
-    parallel (1.24.0)
+    parallel (1.26.3)
     parser (3.2.2.4)
       ast (~> 2.4.1)
       racc