Drop Ruby 2.5 like redis-client

.github/workflows/test.yaml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.2", "3.1", "3.0", "2.7", "2.6", "2.5", "jruby-9.3.6.0"]
+        ruby: ["3.2", "3.1", "3.0", "2.7", "2.6", "jruby-9.3.6.0"]
     runs-on: ubuntu-latest
     env:
       LOW_TIMEOUT: "0.01"
@@ -122,7 +122,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "2.5"
+          ruby-version: "2.6"
           bundler-cache: true
       - name: Cache local temporary directory
         uses: actions/cache@v4
@@ -159,7 +159,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "2.5"
+          ruby-version: "2.6"
           bundler-cache: true
       - name: Cache local temporary directory
         uses: actions/cache@v4
@@ -194,7 +194,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "2.5"
+          ruby-version: "2.6"
           bundler-cache: true
       - name: Cache local temporary directory
         uses: actions/cache@v4

.rubocop.yml

@@ -1,7 +1,7 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.6
 
 Layout/LineLength:
   Max: 120
@@ -56,6 +56,9 @@ Metrics/PerceivedComplexity:
 Style/PercentLiteralDelimiters:
   Enabled: false
 
+Style/SlicingWithRange:
+  Enabled: false
+
 Style/TrailingCommaInArrayLiteral:
   Enabled: false
 

cluster/test/helper.rb

@@ -72,8 +72,7 @@ def redis_cluster_mock(commands, options = {})
       port = nil
 
       cluster_subcommands = if commands.key?(:cluster)
-        commands.delete(:cluster)
-                .to_h { |k, v| [k.to_s.downcase, v] }
+        commands.delete(:cluster).transform_keys { |k| k.to_s.downcase }
       else
         {}
       end

redis.gemspec

@@ -43,7 +43,7 @@ Gem::Specification.new do |s|
   s.files         = Dir["CHANGELOG.md", "LICENSE", "README.md", "lib/**/*"]
   s.executables   = `git ls-files -- exe/*`.split("\n").map { |f| File.basename(f) }
 
-  s.required_ruby_version = '>= 2.5.0'
+  s.required_ruby_version = '>= 2.6.0'
 
   s.add_runtime_dependency('redis-client', '>= 0.17.0')
 end