Ruby

[ruby/json] Use String#encode instead of rb_str_conv_enc()

• rb_str_conv_enc() returns the source string unmodified
  if the conversion did not work. But we should be consistent with
  the generator here and only accept BINARY or convertible to UTF-8.

https://github.com/ruby/json/commit/1344ad6f66