Default exports broken

[jtenner]

Minimal repro here: https://webassembly.studio/?f=i7lefl19ym9

Looks like it has to do with the parser treating default exports as regular exports.

[MaxGraey]

duplicate: #98

[dcodeIO]

The minimal repro there seems to work. Did we do something about that already?

[MaxGraey]

Hmm, yeah it seems this already repaired

[MaxGraey]

Could we close this?

[dcodeIO]

Closing, as the initial repro seems to work and #1257 fixes something that seems related. Feel free to reopen if there are still issues :)