portgraph 0.2.2

Data structure library for directed graphs with first-level ports.
Documentation
## v0.2.2 (2023-05-11)

This is a bugfix release that fixes a panic when growing the number of ports in an empty node.

- Fix a panic on `set_num_ports` ([#40][])

  [#40]: https://github.com/CQCL/portgraph/issues/40

## v0.2.1 (2023-05-10)

- Implemented serialization on Weights and PortOffset ([#36][])
- Added port capacity to the nodes, and an overallocation factor when increasing
  the number of ports. ([#37][])

  [#36]: https://github.com/CQCL/portgraph/issues/36
  [#37]: https://github.com/CQCL/portgraph/issues/37

## v0.2.0 (2023-05-03)

- Initial release with support for directed graphs with first-level ports.