Update requirements.txt
Update requirements.txt

add an additional requirement, fix #966
limeng12/seqan,bayolau/seqan,ktrappe/seqan,xenigmax/seqan,budach/seqan,JohnReid/seqan,limeng12/seqan,bestrauc/seqan,catkira/seqan,xp3i4/seqan,ktrappe/seqan,bestrauc/seqan,catkira/seqan,xp3i4/seqan,hannespetur/SeqAnHTS,hannespetur/SeqAnHTS,catkira/seqan,bayolau/seqan,JohnReid/seqan,JohnReid/seqan,PF2-pasteur-fr/seqan,catkira/seqan,limeng12/seqan,catkira/seqan,xp3i4/seqan,PF2-pasteur-fr/seqan,bestrauc/seqan,PF2-pasteur-fr/seqan,ktrappe/seqan,bayolau/seqan,budach/seqan,PF2-pasteur-fr/seqan,catkira/seqan,limeng12/seqan,limeng12/seqan,catkira/seqan,budach/seqan,hannespetur/SeqAnHTS,budach/seqan,hannespetur/SeqAnHTS,JohnReid/seqan,hannespetur/SeqAnHTS,PF2-pasteur-fr/seqan,ktrappe/seqan,bayolau/seqan,xenigmax/seqan,hannespetur/SeqAnHTS,xp3i4/seqan,bestrauc/seqan,limeng12/seqan,xp3i4/seqan,bestrauc/seqan,budach/seqan,xenigmax/seqan,xp3i4/seqan,xenigmax/seqan,ktrappe/seqan,budach/seqan,bayolau/seqan,budach/seqan,bayolau/seqan,bayolau/seqan,PF2-pasteur-fr/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,bestrauc/seqan,budach/seqan,PF2-pasteur-fr/seqan,JohnReid/seqan,limeng12/seqan,bayolau/seqan,limeng12/seqan,JohnReid/seqan,PF2-pasteur-fr/seqan,hannespetur/SeqAnHTS,hannespetur/SeqAnHTS,ktrappe/seqan,catkira/seqan,xp3i4/seqan,hannespetur/SeqAnHTS,budach/seqan,bestrauc/seqan,PF2-pasteur-fr/seqan,ktrappe/seqan,ktrappe/seqan,xenigmax/seqan,xp3i4/seqan,bayolau/seqan,catkira/seqan,limeng12/seqan,JohnReid/seqan,JohnReid/seqan,ktrappe/seqan,xp3i4/seqan,bestrauc/seqan,JohnReid/seqan