ps-tree < 1.1.1 has a deprecated dependency due to malicious code

[estreiten]

Hi! I know it may imply a huge version jump, but is it possible to use ps-tree >=1.1.1 on this module in order to update forever?
It's the threat reported on the issue you fixed on ps-tree too: indexzero/ps-tree#33

Any info related will be appreciated, thanks!

[kibertoad]

@estreiten Unfortunately, plenty of tests fail after the update, so some effort is needed to make that happen. Any contributions in that direction would be most welcome :)

[ffflorian]

Locally the tests were green so I created #191.