Listing exports from wasm-smith-generated modules

Hey! So I’m trying to list the exports of modules generated by wasm-smith.

My first attempt was the following:
```rust
fuzz_target!(|data: wasm_smith::Module| {
let bytes = data.to_bytes();
let module = wasmparser::validate(&bytes).expect("wasm-smith-generated module is invalid");
if module.module_count() < 1 {
return;
}
let exports = &module
.module_at(0)
.expect("wasm-smith-generated module does not have one module")
.exports;
// ...
});
```

Except… it turns out `module.module_count()` apparently is always 0.

I managed to do what I wanted with the following:
```rust

fuzz_target!(|data: wasm_smith::Module| {
let bytes = data.to_bytes();
let mut exports = Vec::new();
for s in wasmparser::Parser::new(0).parse_all(&bytes) {
let s = s.expect("wasm-smith-generated module is invalid");
if let wasmparser::Payload::ExportSection(s) = s {
for e in s.into_iter() {
let e = e.expect("wasm-smith-generated module is invalid");
exports.push(e.name.to_owned());
}
}
}
// ...
});
```

But I’m wondering… is the first one not supposed to be the same? It’s been hard finding documentation on `Types`, but my understanding of it is it should also list all the exports?

(If not, let’s have this issue serve as google-able "documentation" for how to do it :))