fixes YYYYMMDDHHMMSS strs (#145)
fixes YYYYMMDDHHMMSS strs (#145)

aligns with https://github.com/csirtgadgets/cifsdk-py-v3/blob/master/cifsdk/utils/zarrow.py#L30 and fixes the issue where the trailing Z would cause a non-match from arrow.
csirtgadgets/csirtg-indicator-py,csirtgadgets/csirtg-indicator-py