Bump rubocop from 0.93.1 to 1.8.1

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.93.1 to 1.8.1.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.93.1...v1.8.1)

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

Gemfile.lock

@@ -240,7 +240,7 @@ GEM
       shellany (~> 0.0)
     orm_adapter (0.5.0)
     parallel (1.20.1)
-    parser (2.7.2.0)
+    parser (3.0.0.0)
       ast (~> 2.4.1)
     pdf-core (0.8.1)
     pg (1.2.3)
@@ -330,25 +330,25 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.10.1)
-    rubocop (0.93.1)
+    rubocop (1.8.1)
       parallel (~> 1.10)
-      parser (>= 2.7.1.5)
+      parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8)
+      regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 0.6.0)
+      rubocop-ast (>= 1.2.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.3.0)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.4.0)
       parser (>= 2.7.1.5)
     rubocop-rails (2.9.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 0.90.0, < 2.0)
-    rubocop-rspec (1.44.1)
-      rubocop (~> 0.87)
-      rubocop-ast (>= 0.7.1)
-    ruby-progressbar (1.10.1)
+    rubocop-rspec (2.1.0)
+      rubocop (~> 1.0)
+      rubocop-ast (>= 1.1.0)
+    ruby-progressbar (1.11.0)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -400,7 +400,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.7.0)
+    unicode-display_width (2.0.0)
     warden (1.2.9)
       rack (>= 2.0.9)
     web-console (4.1.0)