Make new-version.rb windows delegate to generate-windows-versions.rb

generate-windows-versions.rb

@@ -31,4 +31,3 @@ versions['mswin'] = 'https://github.com/MSP-Greg/ruby-loco/releases/download/rub
 versions['ucrt'] = 'https://github.com/MSP-Greg/ruby-loco/releases/download/ruby-master/ruby-ucrt.7z'
 
 File.binwrite 'windows-versions.json', "#{JSON.pretty_generate(versions)}\n"
-

new-version.rb

@@ -1,5 +1,10 @@
 engine_input, version = ARGV.fetch(0).split('-', 2)
 
+if engine_input == 'windows'
+  require_relative 'generate-windows-versions'
+  exit
+end
+
 MATCH = case engine_input
 when 'ruby', 'jruby'
   /^\d+\.\d+\./