• Upgrade to 0.8.3

Release notes at https://github.com/igraph/python-igraph/releases/tag/0.8.3

• Update WWW: URL
• Set LIB_DEPENDS for math/igraph
• Depends on py-cairocffi
• Let it find an image viewer for FreeBSD

Without that, you cannot run code like:

import igraph as ig
g = ig.Graph.Famous("petersen")
ig.plot(g)

• Add a plist

PR: 252381
Submitted by: /me
Approved by: lwhsu@ (maintainer)