Enable Wasm BigInt. This enables WASM_BIGINT while maintaining (hypothetical) Safari 14 support
by shimming BigInt64Array and BigUint64Array if they are missing. I think the
last time we tried to enable WASM_BIGINT was before #2019 so our chances
are significantly better this time.

This will fix dynamic linking bugs, reduce code size, and improve speed.

See also my upstream PR:
https://github.com/emscripten-core/emscripten/pull/17103

- [x] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry

def test_pytest(selenium):
    # TODO: don't use numpy in this test as it's not necessairly installed.
    selenium.load_package(["pytest", "numpy", "nose"])

    selenium.run(
        """
        from pathlib import Path
        import os
        import numpy
        import pytest

        base_dir = Path(numpy.__file__).parent / "core" / "tests"
        """
    )

    selenium.run("pytest.main([str(base_dir / 'test_api.py')])")

    logs = "\n".join(selenium.logs)
    assert "INTERNALERROR" not in logs

def test_pytest(selenium):
    # TODO: don't use numpy in this test as it's not necessairly installed.
    selenium.load_package(["pytest", "numpy", "nose"])

    selenium.run(
        """
        from pathlib import Path
        import os
        import numpy
        import pytest

        base_dir = Path(numpy.__file__).parent / "core" / "tests"
        """
    )

    selenium.run("pytest.main([str(base_dir / 'test_api.py')])")

    logs = "\n".join(selenium.logs)
    assert "INTERNALERROR" not in logs
