Bump rubocop from 0.85.1 to 0.87.0

Gemfile.lock

@@ -8,7 +8,7 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.0)
+    ast (2.4.1)
     commonmarker (0.21.0)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.1.5)
@@ -18,24 +18,24 @@ GEM
       concurrent-ruby (~> 1.0)
     minitest (5.14.1)
     paint (2.2.0)
-    parallel (1.19.1)
-    parser (2.7.1.3)
-      ast (~> 2.4.0)
+    parallel (1.19.2)
+    parser (2.7.1.4)
+      ast (~> 2.4.1)
     rainbow (3.0.0)
     rake (13.0.1)
     redcarpet (3.5.0)
     regexp_parser (1.7.1)
     rexml (3.2.4)
-    rubocop (0.85.1)
+    rubocop (0.87.0)
       parallel (~> 1.10)
-      parser (>= 2.7.0.1)
+      parser (>= 2.7.1.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.7)
       rexml
-      rubocop-ast (>= 0.0.3)
+      rubocop-ast (>= 0.1.0, < 1.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.0.3)
+    rubocop-ast (0.1.0)
       parser (>= 2.7.0.1)
     ruby-enum (0.7.2)
       i18n