Pyodide 0.29 Release

We are pleased to announce the Pyodide v0.29.0 release. This is a small feature
release.

toJs() and to_js() now convert dictionaries to Object instead of Map by default

After much feedback from users, we changed toJs() and to_js() to convert
dictionaries to Object by default. To opt into the old behavior, you can pass
toJsLiteralMap: true to loadPyodide(). This will be removed in a future
release.

This was the main change motivating the feature release.