v2.6.3

Improvements

• Typings in array/group.py
• Typing for Transformer
• d3.interpolate docstring and typing
• Removed argpass from geo/stream.py in order to improve performance

Fixes

• Fixed Selection.clone which was implemented to copy all nodes and data and now it copies nodes and inserts them after their siblings
• Fixed ScaleBand and ScalePoint docstrings
• Fixed margin issues for examples/scatter_matrix.py