release(4.23.0): support for cross section analysis on skels

- Also fixes for sharded downsampling
- no queue needed for skeleton forging
- exceeding memory target for downsampling is now a warning
- stop_layer in ImageShardTransferTask
- Skeletonizing fewer than 5 labels while meshes are available
  will target the bounding box rather than processing the whole
  dataset.

igneous_cli/cli.py

@@ -143,7 +143,7 @@ def compute_bounds(path, mip, xrange, yrange, zrange):
 
 @click.group()
 @click.option("-p", "--parallel", default=1, help="Run with this number of parallel processes. If 0, use number of cores.")
-@click.version_option(version="4.22.1")
+@click.version_option(version="4.23.0")
 @click.pass_context
 def main(ctx, parallel):
   """