Bump rubocop from 0.93.1 to 1.3.1

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.93.1 to 1.3.1.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.93.1...v1.3.1)

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

Gemfile.lock

@@ -208,7 +208,7 @@ GEM
       rack (>= 1.2, < 3)
     pagedown-bootstrap-rails (2.1.4)
       railties (> 3.1)
-    parallel (1.19.2)
+    parallel (1.20.0)
     parser (2.7.2.0)
       ast (~> 2.4.1)
     path_expander (1.1.0)
@@ -311,20 +311,20 @@ GEM
       rspec-mocks (~> 3.9)
       rspec-support (~> 3.9)
     rspec-support (3.9.4)
-    rubocop (0.93.1)
+    rubocop (1.3.1)
       parallel (~> 1.10)
       parser (>= 2.7.1.5)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8)
       rexml
-      rubocop-ast (>= 0.6.0)
+      rubocop-ast (>= 1.1.1)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.1.0)
+    rubocop-ast (1.1.1)
       parser (>= 2.7.1.5)
-    rubocop-rspec (1.44.1)
-      rubocop (~> 0.87)
-      rubocop-ast (>= 0.7.1)
+    rubocop-rspec (2.0.0)
+      rubocop (~> 1.0)
+      rubocop-ast (>= 1.1.0)
     ruby-progressbar (1.10.1)
     ruby-vips (2.0.17)
       ffi (~> 1.9)