Fails to build under Python 3.13

[lwp-joel]

What did you do?

I built the package using: pip install 'git+https://github.com/uploadcare/pillow-simd'

What did you expect to happen?

Compilation would succeed

What actually happened?

I got this error:

      src/_webp.c:919:28: error: initialization of ‘PyObject * (*)(PyObject *, PyObject *)’ {aka ‘struct _object * (*)(struct _object *, struct _object *)’} from incompatible pointer type ‘PyObject * (*)(void)’ {aka ‘struct _object * (*)(v
oid)’} [-Wincompatible-pointer-types]
        919 |     {"WebPDecoderVersion", WebPDecoderVersion_wrapper, METH_NOARGS, "WebPVersion"},
            |                            ^~~~~~~~~~~~~~~~~~~~~~~~~~
      src/_webp.c:919:28: note: (near initialization for ‘webpMethods[4].ml_meth’)
      src/_webp.c:876:1: note: ‘WebPDecoderVersion_wrapper’ declared here
        876 | WebPDecoderVersion_wrapper() {
            | ^~~~~~~~~~~~~~~~~~~~~~~~~~
      src/_webp.c:921:6: error: initialization of ‘PyObject * (*)(PyObject *, PyObject *)’ {aka ‘struct _object * (*)(struct _object *, struct _object *)’} from incompatible pointer type ‘PyObject * (*)(void)’ {aka ‘struct _object * (*)(vo
id)’} [-Wincompatible-pointer-types]
        921 |      WebPDecoderBuggyAlpha_wrapper,
            |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      src/_webp.c:921:6: note: (near initialization for ‘webpMethods[5].ml_meth’)
      src/_webp.c:904:1: note: ‘WebPDecoderBuggyAlpha_wrapper’ declared here
        904 | WebPDecoderBuggyAlpha_wrapper() {
            | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      src/_imagingft.c: In function ‘getfont’:
      src/_imagingft.c:138:13: warning: ‘Py_FileSystemDefaultEncoding’ is deprecated [-Wdeprecated-declarations]
        138 |             Py_FileSystemDefaultEncoding,
            |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      In file included from /usr/include/python3.13/Python.h:99,
                       from src/_imagingft.c:22:
      /usr/include/python3.13/fileobject.h:22:46: note: declared here
         22 | Py_DEPRECATED(3.12) PyAPI_DATA(const char *) Py_FileSystemDefaultEncoding;
            |                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      building 'PIL._imagingtk' extension

What are your OS, Python and Pillow versions?

• OS: Linux 6.15
• Python: 3.13
• Pillow: Latest Git (4c0ee09)

Thanks for your work on this project!