async codegen type decls missing & no promise resolving of number/void types

[ross-weir]

Using deno_bindgen==0.7.0 I'm facing some issues with non_blocking / async codegen.

Given the following defs:

#[deno_bindgen(non_blocking)]
pub fn test_str_async() -> String {
    "test".to_string()
}

#[deno_bindgen(non_blocking)]
pub fn test_u32_async() -> u32 {
    1
}

#[deno_bindgen(non_blocking)]
pub fn test_void_async() {}

Generates the following TS:

...

const _lib = await prepare(opts, {
  test_str_async: { parameters: [], result: "pointer", nonblocking: true },
  test_u32_async: { parameters: [], result: "u32", nonblocking: true },
  test_void_async: { parameters: [], result: "void", nonblocking: true },
})

export function test_str_async() {
  let rawResult = _lib.symbols.test_str_async()
  const result = rawResult.then(readPointer)
  return result.then(decode)
}
export function test_u32_async() {
  let rawResult = _lib.symbols.test_u32_async()
  const result = rawResult
  return result
}
export function test_void_async() {
  let rawResult = _lib.symbols.test_void_async()
  const result = rawResult
  return result
}

Some issues:

• Function type declarations are missing and inferred as any, for test_str_async I would expect a return type of Promise<string> or the function to be marked as async function ...
• test_u32_async & test_void_async are not resolving the promise result like test_str_async - there's no indication in the function declaration it returns a promise