Assert that all prior methods can take arrays of values as arguments

Currently there are some that have conditional checks which break this behaviour: e.g. https://git.ligo.org/lscsoft/bilby/blob/master/bilby/core/prior.py#L1243

changed milestone to %0.6.0

added Bug Good First Issue labels

changed the description

mentioned in merge request !650 (merged)

assigned to @bruce.edelman

added 1 deleted label

mentioned in commit 52623a5d

closed via merge request !650 (merged)

unassigned @bruce.edelman