[test-updates] Adding retries to forever flakey choco installs. Also downgrading node on appveyor to node 11 since 12 seems not ready yet.
[test-updates] Adding retries to forever flakey choco installs. Also downgrading node on appveyor to node 11 since 12 seems not ready yet.

lektor/lektor,lektor/lektor,lektor/lektor,lektor/lektor