New networkx versions causing failure in tests

[selmanozleyen]

In case you were wondering why the current tests fails after merging here is the reason. With some deprecation of networkx module some tests directly fail (e.g., networkx/networkx#7415). For example a test that calls nx.random_tree. Here is the failure summary for context

FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[3-7] - AttributeError: module 'networkx' has no attribute 'random_tree'
FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[6-None] - AttributeError: module 'networkx' has no attribute 'random_tree'
FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[6-4] - AttributeError: module 'networkx' has no attribute 'random_tree'
FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[6-7] - AttributeError: module 'networkx' has no attribute 'random_tree'
FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[3-None] - AttributeError: module 'networkx' has no attribute 'random_tree'
FAILED tests/datasets/test_dataset.py::TestSimulateData::test_quad_term_tree[3-4] - AttributeError: module 'networkx' has no attribute 'random_tree'
ERROR tests/problems/time/test_lineage_problem.py::TestLineageProblem::test_trees_pipeline - AttributeError: module 'networkx' has no attribute 'random_tree'

ping: @MUCDK

[ArinaDanilina]

fixed in #747