Drop support for Ruby < 2.7

I assume the `activerecord-sql-adapter` is the source of most of our Gem installations. Rails 7.0 requires Ruby 2.7 at minimum. I think this a good base line for now, not a too drastic version increase.

Author: andyundso

.circleci/config.yml

@@ -385,9 +385,6 @@ workflows:
           matrix: &ruby_versions
             parameters:
               ruby_version:
-                - '2.4'
-                - '2.5'
-                - '2.6'
                 - '2.7'
                 - '3.0'
                 - '3.1'
@@ -397,13 +394,4 @@ workflows:
           matrix: *ruby_versions
 
       - install_windows:
-          matrix:
-            parameters:
-              ruby_version:
-                - '2.5'
-                - '2.6'
-                - '2.7'
-                - '3.0'
-                - '3.1'
-                - '3.2'
-                - '3.3'
+          matrix: *ruby_versions

CHANGELOG.md

@@ -1,3 +1,7 @@
+## (unreleased)
+
+* Drop support for Ruby < 2.7
+
 ## 2.1.7
 * Add Ruby 3.3 to the cross compile list
 

Rakefile

@@ -8,7 +8,7 @@ require_relative './ext/tiny_tds/extconsts'
 SPEC = Gem::Specification.load(File.expand_path('../tiny_tds.gemspec', __FILE__))
 
 ruby_cc_ucrt_versions = "3.3.0:3.2.0:3.1.0".freeze
-ruby_cc_mingw32_versions = "3.0.0:2.7.0:2.6.0:2.5.0:2.4.0".freeze
+ruby_cc_mingw32_versions = "3.0.0:2.7.0".freeze
 
 GEM_PLATFORM_HOSTS = {
   'x86-mingw32' => {

tiny_tds.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.rdoc_options  = ['--charset=UTF-8']
   s.extensions    = ['ext/tiny_tds/extconf.rb']
   s.license       = 'MIT'
-  s.required_ruby_version = '>= 2.0.0'
+  s.required_ruby_version = '>= 2.7.0'
   s.metadata['msys2_mingw_dependencies'] = 'freetds'
   s.add_development_dependency 'mini_portile2', '~> 2.5.0'
   s.add_development_dependency 'rake', '~> 13.0.0'