message: fixed nested map key serialization in AS bindings
diff: @@ -8,7 +8,7 @@ writer.write{{#toMsgPack}}{{toGraphQLType}}{{/toMsgPack}}(value, (writer: Write,
  {{/array}}
  {{#map}}
  writer.write{{#toMsgPack}}{{toGraphQLType}}{{/toMsgPack}}(value, (writer: Write, key: {{#key}}{{#toWasm}}{{toGraphQLType}}{{/toWasm}}{{/key}}) => {
  - writer.write{{#toMsgPack}}{{toGraphQLType}}{{/toMsgPack}}(key);
  + writer.write{{#key}}{{#toMsgPack}}{{toGraphQLType}}{{/toMsgPack}}{{/key}}(key);
  }, (writer: Write, value: {{#value}}{{#toWasm}}{{toGraphQLType}}{{/toWasm}}{{/value}}): void => {
  {{> serialize_map_value}}
  });
  