Add bi-directional support

This release adds bi-directional support via the st_folium function. When calling mapdata = st_folium(m), a dict will be returned back to Python with the bounding box and other click data. Improved documentation will come in a future release as time allows, but you can see the examples folder for ideas of how to use this new functionality.

What's Changed

• Make component bidirectional by @blackary in #28
• Fix manifest, bump version by @randyzwitch in #29
• Fix manifest by @randyzwitch in #31
• Add support for getting all drawn objects on the map by @blackary in #32

New Contributors

• @blackary made their first contribution in #28

Full Changelog: v0.5.0...v0.6.0