Bump the required ruby_version to 2.4.0

.github/workflows/test.yaml

@@ -35,7 +35,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest"]
         redis: ["6.2"]
-        ruby: ["3.0", "2.7", "2.6", "2.5", "2.4"]
+        ruby: ["3.0", "2.7", "2.6", "2.5"]
         driver: ["ruby", "hiredis", "synchrony"]
     runs-on: ${{ matrix.os }}
     env:
@@ -88,7 +88,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest"]
         redis: ["6.0", "5.0", "4.0", "3.2", "3.0"]
-        ruby: ["jruby-9.2.9.0", "2.3"]
+        ruby: ["jruby-9.2.9.0", "2.4"]
         driver: ["ruby"]
     runs-on: ${{ matrix.os }}
     env:

.rubocop.yml

@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
 
 Layout/LineLength:
   Max: 120
@@ -100,7 +100,7 @@ Style/WordArray:
 Lint/NonLocalExitFromIterator:
   Enabled: false
 
-Lint/EndAlignment:
+Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 
 Layout/ElseAlignment:

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 = '>= 2.3.0'
+  s.required_ruby_version = '>= 2.4.0'
 
   s.add_development_dependency("em-synchrony")
   s.add_development_dependency("hiredis")