Run core tests in Safari. Partially addresses https://github.com/pyodide/pyodide/issues/989

It runs, but there are several test failures, I'll open separate issues about those.
# Pyodide packages

This folder contains the list of packages built in pyodide.

Packages are built with the Python build system
using `pyodide_build/buildall.py` and `pyodide_build/buildpkg.py` scripts.
See the [documentation](https://pyodide.org/en/stable/development/new-packages.html) for more details.

# Pyodide packages

This folder contains the list of packages built in pyodide.

Packages are built with the Python build system
using `pyodide_build/buildall.py` and `pyodide_build/buildpkg.py` scripts.
See the [documentation](https://pyodide.org/en/stable/development/new-packages.html) for more details.
