v5.15.3

Agents v5.15.3

Diff since v5.15.2

Closed issues:

• add_agent!(model, properties...) much slower than add_agent!(agent, model) with random position (#820)

Merged pull requests:

• Fix performance of some versions of add_agent (#821) (@Tortar)
• Declare arguments with Vararg (#822) (@Tortar)