Fixed bug in get depth of Problem 9.4 for python #110

[deveshks]

Fixes and closes #110

Fix for bug in get_depth for Problem 9.4 for python #110 where node.parent should be used in the while loop condition

$ python3.7 epi_judge_python_solutions/lowest_common_ancestor_with_parent.py 
Test PASSED (948/948) [   3 us]
Time complexity: O(log(size(tree))+height(tree)+log(node1))
Average running time:    4 us
Median running time:     3 us
*** You've passed ALL tests. Congratulations! ***

[tsunghsienlee]

Hi @deveshks ,

Thanks for this. As I mentioned in other thread, this is fixed and will be released in the next version.

[deveshks]

Hi @metopa
This is the PR corresponding to issue #110 as you suggested me to create