Merge branch 'master' into dependabot/pip/pywin32-301

Author: rmsandu

requirements.txt

@@ -39,7 +39,7 @@ python-dateutil==2.8.1
 pytz==2020.1
 pywavelets==1.0.0
 pywin32==301
-PyYAML==5.3.1
+PyYAML==5.4
 ratelimiter==1.2.0.post0
 requests==2.24.0
 scipy==1.5.0
@@ -51,5 +51,5 @@ smmap==3.0.4
 snakemake==5.19.3
 toposort==1.5
 traitlets==4.3.3
-urllib3==1.25.9
+urllib3==1.26.5
 wrapt==1.12.1