Merge branch '2.x.x' of github.com:c0fec0de/anytree into 3.x.x #29

Job	Run time
test (3.7)	1m 40s
test (3.8)	1m 34s
test (3.9)	1m 26s
test (3.10)	1m 11s
test (3.11)	1m 18s
Indicate completion to coveralls.io	13s
	7m 22s

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