Use lastest steep and remove Grepx definition

Gemfile

@@ -11,5 +11,5 @@ gem "rspec", "~> 3.0"
 
 gem "rubocop", "~> 1.21"
 
-gem 'steep', '1.4.0.dev.2', require: false
+gem 'steep', require: false
 gem 'rbs', require: false

Gemfile.lock

@@ -7,87 +7,101 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.4.3)
+    activesupport (7.1.1)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
+      mutex_m
       tzinfo (~> 2.0)
     ast (2.4.2)
+    base64 (0.1.1)
+    bigdecimal (3.1.4)
     concurrent-ruby (1.2.2)
-    csv (3.2.6)
+    connection_pool (2.4.1)
+    csv (3.2.7)
     diff-lcs (1.5.0)
-    ffi (1.15.5)
-    fileutils (1.7.0)
-    i18n (1.12.0)
+    drb (2.1.1)
+      ruby2_keywords
+    ffi (1.16.3)
+    fileutils (1.7.1)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     json (2.6.3)
     language_server-protocol (3.17.0.3)
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.5.3)
-    minitest (5.18.0)
-    parallel (1.22.1)
-    parser (3.2.1.1)
+    minitest (5.20.0)
+    mutex_m (0.1.2)
+    parallel (1.23.0)
+    parser (3.2.2.4)
       ast (~> 2.4.1)
-    pathname (0.2.1)
+      racc
+    racc (1.7.1)
     rainbow (3.1.1)
     rake (13.0.6)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rbs (3.0.4)
-    regexp_parser (2.7.0)
-    rexml (3.2.5)
+    rbs (3.2.2)
+    regexp_parser (2.8.2)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
       rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.1)
+    rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.2)
+    rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.4)
+    rspec-mocks (3.12.6)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
-    rspec-support (3.12.0)
-    rubocop (1.48.1)
+    rspec-support (3.12.1)
+    rubocop (1.57.1)
+      base64 (~> 0.1.1)
       json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.0.0)
+      parser (>= 3.2.2.4)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.26.0, < 2.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.27.0)
+    rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
     securerandom (0.2.2)
-    steep (1.4.0.dev.2)
+    steep (1.5.3)
       activesupport (>= 5.1)
+      concurrent-ruby (>= 1.1.10)
       csv (>= 3.0.9)
       fileutils (>= 1.1.0)
       json (>= 2.1.0)
       language_server-protocol (>= 3.15, < 4.0)
       listen (~> 3.0)
       logger (>= 1.3.0)
-      parallel (>= 1.0.0)
       parser (>= 3.1)
-      pathname (>= 0.2.1)
       rainbow (>= 2.2.2, < 4.0)
-      rbs (>= 2.8.0)
+      rbs (>= 3.1.0)
       securerandom (>= 0.1)
       strscan (>= 1.0.0)
       terminal-table (>= 2, < 4)
-    strscan (3.0.6)
+    strscan (3.0.7)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.4.2)
+    unicode-display_width (2.5.0)
 
 PLATFORMS
   arm64-darwin-21
@@ -100,7 +114,7 @@ DEPENDENCIES
   rspec (~> 3.0)
   rubocop (~> 1.21)
   rubocop-grep!
-  steep (= 1.4.0.dev.2)
+  steep
 
 BUNDLED WITH
    2.4.7

lib/rubocop/cop/grep/grep.rb

@@ -4,7 +4,7 @@ module RuboCop
   module Cop
     module Grep
       # Detect code snippets which are matched with specified Regexps.
-      class Grepx < Base
+      class Grep < Base
         include RangeHelp
 
         def on_new_investigation
@@ -55,8 +55,6 @@ def on_new_investigation
           opt
         end
       end
-
-      Grep = _ = Grepx
     end
   end
 end

sig/rubocop/cop/cop/grep.rbs

@@ -1,7 +1,7 @@
 module RuboCop
   module Cop
     module Grep
-      class Grepx < ::RuboCop::Cop::Base
+      class Grep < ::RuboCop::Cop::Base
         include RangeHelp
 
         type rule = {
@@ -33,8 +33,6 @@ module RuboCop
 
         def cop_config: () -> config
       end
-      # HACK: Steep has a bug when the class name is the same as the parent namespace name.
-      class Grep = Grepx
     end
   end
 end