v0.7.9

Expronicon v0.7.9

Diff since v0.7.8

Closed issues:

• Support ADT type in MLStyle (#24)

Merged pull requests:

• support exporting variants (#33) (@Roger-luo)
• add better arg check (#34) (@Roger-luo)
• stop overloading show (#35) (@Roger-luo)
• use vue for docs (#36) (@Roger-luo)