v0.5.1

GraphNeuralNetworks v0.5.1

Diff since v0.5.0

Closed issues:

• Add tutorials written in Pluto (#168)
• copy(::GNNGraph)? (#191)
• Allow for additonal features in GNNGraph (#210)
• support equivariant neural networks (#221)

Merged pull requests:

• implement copy (#219) (@CarloLucibello)
• equivariant gnn (#223) (@CarloLucibello)
• doc fixes (#224) (@CarloLucibello)