message: fix(runtime-c-api) Update `wasmer_export_func_params_arity` signature.
  The `params_len` argument type of `wasmer_export_func_params_arity`
  must be `uint32_t` to match the `wasmer_export_func_*_arity` results,
  so that casts are not required.
diff: @@ -222,7 +222,7 @@ pub unsafe extern "C" fn wasmer_export_func_params_arity(
  pub unsafe extern "C" fn wasmer_export_func_params(
  func: *const wasmer_export_func_t,
  params: *mut wasmer_value_tag,
  - params_len: c_int,
  + params_len: uint32_t,
  ) -> wasmer_result_t {
  let named_export = &*(func as *const NamedExport);
  let export = &named_export.export;
  