Fix: Increase TOKEN_LIMIT in hir-expand

[xuwaters]

Due to the TOKEN_LIMIT, rust-analyzer failed to expand macro for web-sys::WebGl2RenderingContext https://github.com/rustwasm/wasm-bindgen/blob/main/crates/web-sys/src/features/gen_WebGl2RenderingContext.rs

After increasing the TOKEN_LIMIT, the web-sys::WebGl2RenderingContext can be expanded successfully:

[lnicola]

@bors r+

[bors]

📌 Commit cfa5df1 has been approved by lnicola

It is now in the queue for this repository.

[bors]

⌛ Testing commit cfa5df1 with merge 687b72c...

[bors]

☀️ Test successful - checks-actions
Approved by: lnicola
Pushing 687b72c to master...

[ChayimFriedman2]

I think a better approach from the current token limit is to limit tokens relative to the input size.

[Veykril]

That doesn't seem to make too much sense to me, input size and output size are not necessarily related, we should at some point have a way for macros to overwrite the limit imo though. The limit exists mainly to prevent accidental problems by macros so constantly bumping isn't really allowing it to do its job.

[ChayimFriedman2]

IMO most macro output code proportionally to their input size. So it does make sense. The problem is that then many invocations with an ever increasing input (e.g. tt munchers) won't be flagged. That can be fine if they will reach the recursion limit, or we can make it depend on the size of the original input somehow.