v0.14.2

Catlab v0.14.2

Diff since v0.14.1

Closed issues:

• Style of individual boxes in Tikz output (#643)
• Serialize ACSet presentations to JSON with JSON Schema validation (#648)
• typo in edges(graph,src,tgt) (#662)

Merged pull requests:

• Serialize and deserialize ACSet schemas to JSON (#649) (@aaguinal)
• Theory of double categories with tabulators (#657) (@MichaelJLambert)
• Run GitHub actions on Julia v1.8 (#661) (@epatters)
• Fix connected_component_bfs #634 (#664) (@lcnhb)