RUBY-3554 Update required_ruby_version (#2909)

Author: comandeo-mongo

gemfiles/standard.rb

@@ -28,14 +28,10 @@ def standard_dependencies
     gem 'yajl-ruby', platforms: :mri, require: false
     gem 'celluloid', platforms: :mri, require: false
 
-    # for static analysis -- ignore ruby < 2.6 because of rubocop
-    # version incompatibilities
-    if RUBY_VERSION > '2.5.99'
-      gem 'rubocop', '~> 1.45.1'
-      gem 'rubocop-performance', '~> 1.16.0'
-      gem 'rubocop-rake', '~> 0.6.0'
-      gem 'rubocop-rspec', '~> 2.18.1'
-    end
+    gem 'rubocop', '~> 1.45.1'
+    gem 'rubocop-performance', '~> 1.16.0'
+    gem 'rubocop-rake', '~> 0.6.0'
+    gem 'rubocop-rspec', '~> 2.18.1'
 
     platform :mri do
       # Debugger for VSCode.

mongo.gemspec

@@ -36,7 +36,7 @@ Gem::Specification.new do |s|
   s.require_paths     = ['lib']
   s.bindir            = 'bin'
 
-  s.required_ruby_version = ">= 2.5"
+  s.required_ruby_version = ">= 2.7"
 
   s.add_dependency 'base64'
   s.add_dependency 'bson', '>=4.14.1', '<6.0.0'