Bump pandas from 1.1.0 to 1.1.1 (#42)

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Changelog](https://github.com/pandas-dev/pandas/blob/master/RELEASE.md)
- [Commits](pandas-dev/pandas@v1.1.0...v1.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

requirements-dev.txt

@@ -1,6 +1,6 @@
 wheel==0.35.0
 pytest
 pytest-cov
-pandas==1.1.0
+pandas==1.1.1
 yfinance==0.1.54
 PyYAML==5.3.1