acorn-import-assertions is no longer available if using newer webpack

[yuttie]

The acorn-import-assertions package is used here, but it is missing from package.json as a direct dependency.

With older versions of webpack (e.g. v5.88.2 as indicated in the package-lock.json), acorn-import-assertions is installed indirectly as a dependency of webpack, so the issue does not surface.

However, with recent versions of webpack, acorn-import-assertions is no longer the dependency of webpack, which leads to a build error:

ERROR in ./node_modules/pyodide/pyodide.mjs
Module build failed (from ./node_modules/@pyodide/webpack-plugin/loader.cjs):
Error: Cannot find module 'acorn-import-assertions'

[mneil]

Fixed in #30 . @pyodide/webpack-plugin version 1.3.3 should resolve the issue.