update tests

[vtavana]

revert a change that was made #73

On windows with numpy-2.x.x, we have

>>> numpy.ldexp.types ['ei->e', 'fi->f', 'eq->e', 'fq->f', 'di->d', 'dq->d', 'gi->g', 'gq->g'] 

where numpy.dtype("q") = dtype('int64') so in #73 an "if condition" for s = 'q' was added to get_args function in test_basic.py. The existing "if condition" for s = 'l' should not change since with numpy-1.26.x on Windows we have

>>> numpy.ldexp.types ['ei->e', 'fi->f', 'el->e', 'fl->f', 'di->d', 'dl->d', 'gi->g', 'gl->g'] 

where numpy.dtype("l") = dtype('int32').

While on Linux for both numpy-1.26.x and numpy-2.x.x

>>> numpy.ldexp.types ['ei->e', 'fi->f', 'el->e', 'fl->f', 'di->d', 'dl->d', 'gi->g', 'gl->g'] 

where numpy.dtype("l") = dtype('int64').

[ndgrigorian]

Subtle, glad it was caught, LGTM