Don't use wee_alloc in production code targeting WebAssembly.

It leaks memory: https://github.com/rustwasm/wee\_alloc/issues/106

I know it seems like a low-effort post, but wee\_alloc is often recommended in Rust WASM guides and I've just wasted a ton of time trying to diagnose and resolve memory leak in my app - I'm just raising awareness here hoping to help others or maybe even to bring attention of someone who has an expertise, time and willingness to solve the linked issue in the wee\_alloc crate.