Prepare for ReactPy v2

[Archmonger]

The first public beta of ReactPy v2 is live. This release comes with a lot of internal changes and improvements to ReactPy. As a result, it is likely to break third-party packages such as this repository.

It is recommended to use the beta as a transition period to migrate this packages to support ReactPy v2.

As a note, there are still a few more issue tickets that are planned to be closed prior to the official v2 release that may or may not affect this repository.

• Rewrite event_to_object package reactive-python/reactpy#1196
• Replace reactpy.event with dot notation callbacks reactive-python/reactpy#1143
• Rename reactpy.web.export reactive-python/reactpy#1286
• Rewrite the docs reactive-python/reactpy#863