move ruby min support version to 2.4

Signed-off-by: Philip Li <[email protected]>

Author: rli9

.github/workflows/code.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.0', '2.5', '2.7', '3.2']
+        ruby-version: ['2.4', '2.5', '2.7', '3.2']
 
     steps:
       - uses: actions/checkout@v3

.rubocop.2.0.yml

@@ -1,3 +1,5 @@
+require: rubocop-performance
+
 AllCops:
   NewCops: disable
   SuggestExtensions: false
@@ -160,6 +162,6 @@ Naming/MethodParameterName:
 Naming/HeredocDelimiterNaming:
   Enabled: false
 
-# # Required Ruby version: 2.4
-# Performance/RegexpMatch:
-#   Enabled: false
+# Required Ruby version: 2.4
+Performance/RegexpMatch:
+  Enabled: false

.rubocop.yml

@@ -12,6 +12,7 @@ group :test do
   gem 'ci_reporter_rspec'
   gem 'rspec'
   gem 'rubocop'
+  gem 'rubocop-performance', require: false
   gem 'simplecov'
   gem 'simplecov-rcov'
 end