Produce debug version if the version string includes 'beta'

ignisf · ignisf · commit 98c5a14e35e2 · 2019-04-24T09:48:17.000+03:00
diff --git a/ext/libv8/builder.rb b/ext/libv8/builder.rb
@@ -32,7 +32,7 @@ def generate_gn_args
     end
 
     def debug_build?
-      enable_config('debug')
+      enable_config('debug') || Libv8::VERSION.include?('beta')
     end
 
     def build_libv8!
