Bump rubocop from 1.14.0 to 1.38.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.14.0 to 1.38.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.14.0...v1.38.0)

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

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

Gemfile

@@ -134,7 +134,7 @@ group :development do
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.4'
   gem 'memory_profiler'
-  gem 'rubocop', '~> 1.15', require: false
+  gem 'rubocop', '~> 1.39', require: false
   gem 'rubocop-rails', '~> 2.10', require: false
   gem 'brakeman', '~> 5.0', require: false
   gem 'bundler-audit', '~> 0.8', require: false

Gemfile.lock

@@ -406,7 +406,7 @@ GEM
     parallel (1.20.1)
     parallel_tests (3.7.0)
       parallel
-    parser (3.0.1.1)
+    parser (3.1.2.1)
       ast (~> 2.4.1)
     parslet (2.0.0)
     pastel (0.8.0)
@@ -483,7 +483,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (~> 1.0)
-    rainbow (3.0.0)
+    rainbow (3.1.1)
     rake (13.0.3)
     rdf (3.1.13)
       hamster (~> 3.0)
@@ -493,7 +493,7 @@ GEM
     redis (4.2.5)
     redis-namespace (1.8.1)
       redis (>= 3.0.4)
-    regexp_parser (2.1.1)
+    regexp_parser (2.6.0)
     request_store (1.5.0)
       rack (>= 1.4)
     resolv (0.1.0)
@@ -529,17 +529,18 @@ GEM
     rspec-support (3.10.2)
     rspec_junit_formatter (0.4.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (1.15.0)
+    rubocop (1.39.0)
+      json (~> 2.3)
       parallel (~> 1.10)
-      parser (>= 3.0.0.0)
+      parser (>= 3.1.2.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
-      rexml
-      rubocop-ast (>= 1.5.0, < 2.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.5.0)
-      parser (>= 3.0.1.1)
+    rubocop-ast (1.23.0)
+      parser (>= 3.1.1.0)
     rubocop-rails (2.10.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
@@ -639,7 +640,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
-    unicode-display_width (1.7.0)
+    unicode-display_width (1.8.0)
     uniform_notifier (1.14.1)
     warden (1.2.9)
       rack (>= 2.0.9)
@@ -776,7 +777,7 @@ DEPENDENCIES
   rspec-rails (~> 5.0)
   rspec-sidekiq (~> 3.1)
   rspec_junit_formatter (~> 0.4)
-  rubocop (~> 1.15)
+  rubocop (~> 1.39)
   rubocop-rails (~> 2.10)
   ruby-progressbar (~> 1.11)
   sanitize (~> 5.2)