no change to required ruby version

Author: cramt

quickpay-ruby-client.gemspec

@@ -3,7 +3,7 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "quickpay/api/version"
 
 Gem::Specification.new do |spec|
-  spec.required_ruby_version = ">= 2.6.0" # rubocop:disable Gemspec/RequiredRubyVersion
+  spec.required_ruby_version = ">= 2.5.0" # rubocop:disable Gemspec/RequiredRubyVersion
 
   spec.name          = "quickpay-ruby-client"
   spec.version       = QuickPay::API::VERSION