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](rubocop/rubocop@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

@@ -1,3 +1,3 @@
 source 'https://rubygems.org'
 
-gem 'rubocop', '1.39.0', require: false
+gem 'rubocop', '1.40.0', require: false

Gemfile.lock

@@ -2,14 +2,14 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    json (2.6.2)
+    json (2.6.3)
     parallel (1.22.1)
-    parser (3.1.2.1)
+    parser (3.1.3.0)
       ast (~> 2.4.1)
     rainbow (3.1.1)
-    regexp_parser (2.6.0)
+    regexp_parser (2.6.1)
     rexml (3.2.5)
-    rubocop (1.39.0)
+    rubocop (1.40.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
@@ -19,7 +19,7 @@ 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-progressbar (1.11.0)
     unicode-display_width (2.3.0)
@@ -29,7 +29,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  rubocop (= 1.39.0)
+  rubocop (= 1.40.0)
 
 BUNDLED WITH
    2.2.22