requirements.txt: update

requirements.txt

-pandas==0.25.3
+pandas==1.0.3
 biopython==1.75
 tqdm
 numpy
@@ -6,4 +6,4 @@ regex==2020.2.20
 lazyparser==0.2.0
 coloredlogs==10.0
 seaborn
-matplotlib
\ No newline at end of file
+matplotlib