GNNGraphs-v1.3.1

GNNGraphs GNNGraphs-v1.3.1

Diff since GNNGraphs-v1.3.0

Merged pull requests:

• simplify documentation (#531) (@CarloLucibello)
• Add token to codecov action (#532) (@gdalle)
• revisit docs organization (#535) (@CarloLucibello)
• docs improvements (#539) (@CarloLucibello)
• updates to GNNLux for first release (#540) (@CarloLucibello)
• improve GNNLux docs (#542) (@CarloLucibello)
• Add version selector (#543) (@aurorarossi)
• Add Hands On tutorial GNNLux (#549) (@aurorarossi)
• try new approach for building and deploying docs (#552) (@CarloLucibello)

Closed issues:

• coverage not displayed in readme (#528)
• [docs] move tutorials to GraphNeuralNetworks.jl package (#533)
• Stack Layers in a HeteroGraphConv Model (#541)
• [lux] add tutorials (#544)