fixup! fixup! Rails 6.0.0.beta3 and friends

Gemfile.lock

@@ -155,7 +155,6 @@ GEM
       ast (~> 2.4.0)
     pg (1.1.4)
     popper_js (1.14.5)
-    powerpack (0.1.2)
     psych (3.1.0)
     public_suffix (3.0.3)
     puma (3.12.0)
@@ -217,15 +216,14 @@ GEM
     rspec-support (3.8.0)
     rspec_junit_formatter (0.4.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (0.65.0)
+    rubocop (0.66.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5, != 2.5.1.1)
-      powerpack (~> 0.1)
       psych (>= 3.1.0)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.4.0)
+      unicode-display_width (>= 1.4.0, < 1.6)
     ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
     rubyzip (1.2.2)
@@ -289,7 +287,7 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.4.1)
+    unicode-display_width (1.5.0)
     websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)