Forest v2.0.3

Changes:

1. Bugfixes
   • Keys delay n and .wrap n pgfmath args don't introduce two layers of hash doubling anymore (with compat keys for the old, confusing behaviour).
   • Execute tikz code for all (including phantom) nodes. (The feature of ignoring phantom nodes was introduced in v2.0.2, but turns out it was a bad idea: for example, having a phantom root with some tikz code is not uncommon.)
   • Keys label and pin now append to option tikz, as makes sense.
   • Fix nodewalk steps filter and branch so that they can be embedded under nodewalk operations.
   • Execute before packing node even when the node has no children.
   • level<={0}{...} now works as expected.
   • Re-setting the node name to the same value doesn't yield an error anymore.
   • Don't add the separator when adding the first element to a keylist option or register.
   • Copy externalization files in TeX (don't rely on \write18).
   • Consistently store dimen options and registers with pts of catcode other.
   • Properly initialize readonly count options (n, n' n children and level).
2. New features
   • Rework draw tree edge so that by default, an edge is drawn only it both its node and its node's parent are drawn. And yes, implement if node drawn.
   • Implement circularity detection in dynamic node operations.
   • Implement debug categories and debugging of dynamic node operations.
   • Declare some further tempdim... registers.
   • Make option id accessible via \forestoption.