Upgrade Conway Dependency

[nickcastel50]

This PR upgrades the Conway Dependency to latest main. It addresses permissive parsing for nullable references.

It also removes the copying of wasm modules for the Conway shim since that is no longer needed.

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[pablo-mayrgundter]

w00t https://deploy-preview-826--bldrs-share-v2.netlify.app/share/v/gh/buildingSMART/IFC/master/Examples/Basic%20geometric%20shape/Examples/Extruded%20solid/File.ifc

[pablo-mayrgundter]

w00t!