Fix pytest config to run doctests

[kieran-ryan]

Present state: as the source code is not configured as a test path, the doc tests do not run locally or in CI.

configfile: pyproject.toml
testpaths: tests
plugins: doctestplus-1.1.0
collected 90 items                                                                   

tests/test_removestar.py ..................................................... [ 58%]
...................................                                            [ 97%]
tests/test_removestar_nb.py ..                                                 [100%]

================================= 90 passed in 7.83s =================================

Change post-configuration:

configfile: pyproject.toml
testpaths: removestar, tests
plugins: doctestplus-1.1.0
collected 93 items                                                                   

removestar/removestar.py s..                                                   [  3%]
tests/test_removestar.py ..................................................... [ 60%]
...................................                                            [ 97%]
tests/test_removestar_nb.py ..                                                 [100%]

=========================== 92 passed, 1 skipped in 6.46s ============================

[kieran-ryan]

@asmeurer, @Saransh-cpp; any idea what's causing the flakiness in the get_names method doctests, that the order of the return values changes on consecutive runs?

[Saransh-cpp]

Sorry couldn't take a look sooner, did the flakiness go away?

[kieran-ryan]

Sorry couldn't take a look sooner, did the flakiness go away?

Remains unresolved, haven't put much time to debug, any ideas? Kept the skip doctest indicator though other doctests now thankfully running in pipeline.