No rich diff when running from pytest

[dpinol]

https://github.com/Solganis/assertpy2#why-fluent-assertions describes that the library shows the path differences in color, but this doesn't happen when using from pytest.

From pytest

from assertpy2 import assert_that
def test():
     assert_that({0: 0}).is_equal_to({0:1})

tests/test_equals.py:2 (test)
def test():
>       assert_that({0: 0}).is_equal_to({0:1})
E       assertpy2.AssertionFailure: Expected <{0: 0}> to be equal to <{0: 1}>, but was not.

Without pytest

from assertpy2 import assert_that
assert_that({0: 0}).is_equal_to({0:1})


E   assertpy2.AssertionFailure: Expected <{0: 0}> to be equal to <{0: 1}>, but was not.
E   diff (dict):
E     0:
E       - 0
E       + 1