Upgrade TypeScript to v7.

[brendandahl]

The behavior of TypeScript's --emitDeclarationOnly mode has changed in v7 which caused some changes to the definitions that Emscripten outputs now.

[sbc100]

This doesn't change what we generate, or break compat with v6 right? Its mostly about the version that we test against?

Maybe worth calling that out in the description?

[sbc100]

I guess this is what happens when you try to ship a native binary in node and cover all your bases.. kind of sad. I guess @kripken was right that we should just ship wasm binaries in this case!

[brendandahl]

Emscripten will generate different TS definitions if the user has v6 or v7. We use tsc's --emitDeclarationOnly which they've change the behavior of. The changes look like they should be fine with either version though, but the user should probably use a consistent version of TS for generating and running their program.