Fixes:

```
/usr/local/ruby/include/ruby-3.3.0+0/ruby/internal/core/rtypeddata.h:467:33:
error: invalid conversion from ‘void*’ to ‘parser_t*’ [-fpermissive]
  467 |     (sval) = RTYPEDDATA_GET_DATA(result); \
      |              ~~~~~~~~~~~~~~~~~~~^~~~~~~~
      |                                 |
      |                                 void*
```