Bump rubocop from 1.25.1 to 1.26.1

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.25.1 to 1.26.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.25.1...v1.26.1)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -242,7 +242,7 @@ GEM
     octokit (4.22.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    parallel (1.21.0)
+    parallel (1.22.0)
     parser (3.1.1.0)
       ast (~> 2.4.1)
     pathutil (0.16.2)
@@ -256,13 +256,13 @@ GEM
     regexp_parser (2.2.1)
     rexml (3.2.5)
     rouge (3.26.0)
-    rubocop (1.25.1)
+    rubocop (1.26.1)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.15.1, < 2.0)
+      rubocop-ast (>= 1.16.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
     rubocop-ast (1.16.0)