Remove support for ruby 2.3

Author: David Revelo

.circleci/config.yml

@@ -47,7 +47,6 @@ workflows:
           matrix:
             parameters:
               ruby-version:
-                - '2.3'
                 - '2.4'
                 - '2.5'
                 - '2.6'
@@ -68,14 +67,6 @@ workflows:
                 - gemfiles/rails6.1_graphql1.11.gemfile
                 - gemfiles/rails6.1_graphql1.12.gemfile
             exclude:
-              - ruby-version: '2.3'
-                gemfile: gemfiles/rails6.0_graphql1.11.gemfile
-              - ruby-version: '2.3'
-                gemfile: gemfiles/rails6.0_graphql1.12.gemfile
-              - ruby-version: '2.3'
-                gemfile: gemfiles/rails6.1_graphql1.11.gemfile
-              - ruby-version: '2.3'
-                gemfile: gemfiles/rails6.1_graphql1.12.gemfile
               - ruby-version: '2.4'
                 gemfile: gemfiles/rails6.0_graphql1.11.gemfile
               - ruby-version: '2.4'

graphql_devise.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
     `git ls-files -z`.split("\x0").select { |f| f.match(%r{^spec/}) }
   end
 
-  spec.required_ruby_version = '>= 2.3.0'
+  spec.required_ruby_version = '>= 2.4.4'
 
   spec.add_dependency 'devise_token_auth', '>= 0.1.43', '< 2.0'
   spec.add_dependency 'graphql', '>= 1.8', '< 1.13.0'