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esm: --experimental-wasm-modules integration support

Rodrigo Muino Tomonari requested to merge github/fork/guybedford/wasm-modules into master

This PR provides support for node --experimental-modules --experimental-wasm-modules to support the ES module integration of WebAssembly modules through eg import './module.wasm'.

The semantics match the proposed ES module integration semantics for Web Assembly as specified in https://github.com/webassembly/esm-integration.

At the previous modules group meeting we got consensus approval for upstreaming this feature under the --experimental-wasm-modules flag.

//cc @nodejs/modules

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • documentation is changed or added
  • commit message follows commit guidelines

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