Using usize for ids is incorrect.

[JNissi]

Both the place_id and osm_id can be quite a bit larger than u32. When run on a target with 32bit usize (wasm in this case) parsing the responses starts panicking at these ids.

Please consider changing the integer ids to u64 instead of usize.

[JNissi]

I'm in the middle of something and don't have the time to submit a PR right now, but probably can in a few weeks. There's some other wasm-related changes too.