Update dependency pandas to v1.1.4

Author: renovate-bot

requirements.txt

@@ -2,7 +2,7 @@ elasticsearch==7.6.0
 elasticsearch-dsl==7.1.0
 jenkspy==0.1.5
 numpy==1.18.3
-pandas==1.0.3
+pandas==1.1.4
 python-dateutil==2.8.1
 pytz==2020.1
 six==1.14.0