feat: add `--no-modules-global` support

[fosskers]

This PR adds pass-through support for the wasm-bindgen flag --no-modules-global, which is very useful when building/running WASM in certain scenarios (browser extensions in particular).

Supercedes #860 which was mysteriously closed last summer.

Closes #729.

---

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• [x] You have the latest version of rustfmt installed

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✨✨ 😄 Thanks so much for contributing to wasm-pack! 😄 ✨✨

[fosskers]

See also https://github.com/rustwasm/wasm-bindgen/issues/2700.

[fosskers]

We are using this downstream and it's working well.

[fosskers]

Hi there, any thoughts on this?

[gthb]

LGTM (as a random person on the internet with no approval/commit rights)

[fosskers]

Hi there, it's been another month. Any thoughts?

[RonaldColyar]

LGTM

[fosskers]

No clue, we've been using it for a while without issue.

[wlinna]

I'd really like to have this feature as well, but apparently wasm-pack is lacking maintainers https://github.com/rustwasm/wasm-pack/issues/928

I wonder if I should use wasm-bindgen cli directly for this while waiting (?).