Remove explicit rubocop

.version

@@ -1 +1 @@
-0.0.8
+0.0.9

Gemfile

@@ -8,5 +8,3 @@ gemspec
 gem "rake", "~> 13.0"
 
 gem "rspec", "~> 3.0"
-
-gem "rubocop", "~> 1.21"

Gemfile.lock

@@ -9,6 +9,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.1.1)
     diff-lcs (1.5.0)
     faraday (2.7.10)
       faraday-net_http (>= 2.0, < 3.1)
@@ -18,6 +19,7 @@ GEM
     faraday-net_http (3.0.2)
     json (2.6.3)
     language_server-protocol (3.17.0.3)
+    lint_roller (1.1.0)
     multipart-post (2.3.0)
     parallel (1.23.0)
     parser (3.2.2.3)
@@ -27,7 +29,7 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.8.1)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -41,21 +43,37 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.1)
-    rubocop (1.54.2)
+    rubocop (1.56.3)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
       parser (>= 3.2.2.3)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.0, < 2.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
+    rubocop-performance (1.19.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
+    standard (1.31.1)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.56.2)
+      standard-custom (~> 1.0.0)
+      standard-performance (~> 1.2)
+    standard-custom (1.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.50)
+    standard-performance (1.2.0)
+      lint_roller (~> 1.1)
+      rubocop-performance (~> 1.19.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS
@@ -65,7 +83,7 @@ DEPENDENCIES
   atlas_rb!
   rake (~> 13.0)
   rspec (~> 3.0)
-  rubocop (~> 1.21)
+  standard
 
 BUNDLED WITH
    2.2.33