BUG: passing one or more filtering parameters to dereplicate-sequences results in error

[colinvwood]

Forum users have reported errors using the dereplicate-sequences action when providing the --p-min-seq-length and/or the --p-min-unique-size parameters here and here. In one case, removing the --p-min-unique-size parameter (while changing no other variables) allowed the action to complete.

There is one test covering the --p-min-seq-length parameter but none covering the --p-min-unique-size parameter; the latter likely introduces a bug somehow.

[colinbrislawn]

Vsearch is working as intended (I think!) but the following steps fail when trying to build the table.

Related issue: #57