Remove rubocop as a dev dependency, rebuild lockfile

Gemfile.lock

@@ -13,7 +13,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
-    ast (2.4.0)
+    ansi (1.5.0)
+    builder (3.2.3)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
     coveralls (0.8.23)
@@ -27,25 +28,20 @@ GEM
       activesupport (>= 3.2)
     i18n (1.7.0)
       concurrent-ruby (~> 1.0)
-    jaro_winkler (1.5.4)
     json (2.2.0)
     method_source (0.9.2)
     minitest (5.13.0)
-    parallel (1.19.0)
-    parser (2.6.5.0)
-      ast (~> 2.4.0)
+    minitest-focus (1.1.2)
+      minitest (>= 4, < 6)
+    minitest-reporters (1.4.2)
+      ansi
+      builder
+      minitest (>= 5.0)
+      ruby-progressbar
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rainbow (3.0.0)
     rake (10.5.0)
-    rubocop (0.76.0)
-      jaro_winkler (~> 1.5.1)
-      parallel (~> 1.10)
-      parser (>= 2.6)
-      rainbow (>= 2.2.2, < 4.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
     ruby-progressbar (1.10.1)
     simplecov (0.16.1)
       docile (~> 1.1)
@@ -59,7 +55,6 @@ GEM
     tins (1.22.2)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.6.0)
     zeitwerk (2.2.1)
 
 PLATFORMS
@@ -70,9 +65,10 @@ DEPENDENCIES
   coveralls (~> 0.8.23)
   falsify!
   minitest (~> 5.8)
+  minitest-focus (~> 1.1)
+  minitest-reporters (~> 1.4)
   pry (~> 0.12.2)
   rake (~> 10.0)
-  rubocop (~> 0.76.0)
   simplecov
 
 BUNDLED WITH

falsify.gemspec

@@ -33,7 +33,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "minitest-reporters", "~> 1.4"
   spec.add_development_dependency "pry", "~> 0.12.2"
   spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "rubocop", "~> 0.76.0"
   spec.add_development_dependency "simplecov"
 
   spec.add_runtime_dependency "enumerize", "~> 2.2.2" # Issue filed regarding 2.3 - https://github.com/brainspec/enumerize/issues/352