Doesn't work on ruby 2.6 because of monkey patching make_time

[codev]

If using ruby 2.6 then

Time.parse('TZID=UTC:19700101T000000')

fails with a stack overflow because date_time_precision monkey patches make_time while calling the original method (aliased as make_time_orig) and make_time calls itself (which now calls the monkey patched version which then calls the make_time_orig again and so on and so on and so on)