Update dependency pandas to v1.1.1

Author: renovate-bot

requirements.txt

@@ -13,7 +13,7 @@ itsdangerous==1.1.0
 Jinja2==2.11.2
 MarkupSafe==1.1.1
 numpy==1.19.1
-pandas==1.1.0
+pandas==1.1.1
 plotly==4.9.0
 python-dateutil==2.8.1
 python-dotenv==0.14.0