message: feat(c-api) Update the definitions of `wasm_func_callback*_t`.
diff: use super::super::store::wasm_store_t;
  use super::super::trap::wasm_trap_t;
  use super::super::types::{wasm_functype_t, wasm_valkind_enum};
  -use super::super::value::{wasm_val_inner, wasm_val_t};
  +use super::super::value::{wasm_val_inner, wasm_val_t, wasm_val_vec_t};
  use std::convert::TryInto;
  use std::ffi::c_void;
  use std::sync::Arc;
  @@ -15,14 +15,16 @@ pub struct wasm_func_t {
  }
  #[allow(non_camel_case_types)]
  -pub type wasm_func_callback_t =
  - unsafe extern "C" fn(args: *const wasm_val_t, results: *mut wasm_val_t) -> *mut wasm_trap_t;
  +pub type wasm_func_callback_t = unsafe extern "C" fn(
  + args: *const wasm_val_vec_t,
  + results: *mut wasm_val_vec_t,
  +) -> *mut wasm_trap_t;
  #[allow(non_camel_case_types)]
  pub type wasm_func_callback_with_env_t = unsafe extern "C" fn(
  *mut c_void,
  - args: *const wasm_val_t,
  - results: *mut wasm_val_t,
  + args: *const wasm_val_vec_t,
  + results: *mut wasm_val_vec_t,
  ) -> *mut wasm_trap_t;
  #[allow(non_camel_case_types)]
  