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.
# Micropip API

```{eval-rst}
.. automodule:: micropip
   :members:
```

# Micropip API

```{eval-rst}
.. automodule:: micropip
   :members:
```
