v0.13.0

GeometricFlux v0.13.0

Diff since v0.12.4

• implement EEquivGraphConv layer with nested design
• support positional encoding from GraphSignals
• add LSPE

Merged pull requests:

• Support LSPE (#306) (@yuehhua)
• WithGraph supports positional encoding (#311) (@yuehhua)
• Refactor (#315) (@yuehhua)
• Correct EEquivGraphConv by vgsatorras/egnn (#316) (@yuehhua)
• New features: positional encoding (#317) (@yuehhua)