v2.0.0-alpha.20

While this is an alpha release, new servers should use this rather than an older "stable" version.

Features:

• Breaking: The u-wave-web npm package now only provides an ES Modules entry point and an
  executable entry point. The CommonJS entry point is removed. (#2580)

Bugfixes:

• Fix a crash when currentDJ object is spuriously empty while media is still being played. (7e679e)

  This shouldn't happen typically, but if the whole app crashes it's also very hard to diagnose,
  so having this case be handled is an improvement.

Internal:

• Use Vite to build the project. (#2580)