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-build-cli)=

# pyodide-build CLI

```{eval-rst}
.. sphinx_argparse_cli::
   :module: pyodide_build.__main__
   :func: make_parser
   :prog: pyodide-build
   :title:
```

(pyodide-build-cli)=

# pyodide-build CLI

```{eval-rst}
.. sphinx_argparse_cli::
   :module: pyodide_build.__main__
   :func: make_parser
   :prog: pyodide-build
   :title:
```
