Bump rubocop from 1.39.0 to 1.40.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.39.0 to 1.40.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.39.0...v1.40.0)

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

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

Gemfile.lock

@@ -152,7 +152,7 @@ GEM
       gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    json (2.6.2)
+    json (2.6.3)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -186,7 +186,7 @@ GEM
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.22.1)
-    parser (3.1.2.1)
+    parser (3.1.3.0)
       ast (~> 2.4.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
@@ -212,10 +212,10 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    regexp_parser (2.6.0)
+    regexp_parser (2.6.1)
     rexml (3.2.5)
     rouge (4.0.0)
-    rubocop (1.39.0)
+    rubocop (1.40.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
@@ -225,7 +225,7 @@ GEM
       rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.23.0)
+    rubocop-ast (1.24.0)
       parser (>= 3.1.1.0)
     ruby-enum (0.8.0)
       i18n