Log Message:
py-cutadapt: updated to 3.4

v3.4 (2021-03-30)
-----------------
* :issue:`481`: An experimental single-file Windows executable of Cutadapt
  is `available for download on the GitHub "releases"
  page <https://github.com/marcelm/cutadapt/releases>`_.
* :issue:`517`: Report correct sequence in info file if read was reverse complemented
* :issue:`517`: Added a column to the info file that shows whether the read was
  reverse-complemented (if ``--revcomp`` was used)
* :issue:`320`: Fix (again) "Too many open files" when demultiplexing