Change style of calls within tests to make it easier to use the tests against other libraries
Change style of calls within tests to make it easier to use the tests against other libraries

(ex. `from pendulum.parsing import parse_iso8601 as parse_datetime`)

closeio/ciso8601,closeio/ciso8601,elasticsales/ciso8601,elasticsales/ciso8601,closeio/ciso8601