river 0.3.3

This release updates the required Zig version to 0.13.

There are no changes to river's behavior, only the build requirements.

Full changelog:

Isaac Freund (4):
      build: bump version to 0.3.3-dev
      ci: cleanup messy tar invocations
      build: update to Zig 0.13.0
      build: bump version to 0.3.3