Bump pandas from 1.1.4 to 1.2.3

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.1.4 to 1.2.3.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Changelog](https://github.com/pandas-dev/pandas/blob/master/RELEASE.md)
- [Commits](pandas-dev/pandas@v1.1.4...v1.2.3)

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

Author: dependabot[bot]

requirements.txt

@@ -8,7 +8,7 @@ click==7.1.2
 opencv-python==3.4.5.20
 opencv-contrib-python==4.4.0.46
 numpy>=1.14.5
-pandas==1.1.4
+pandas==1.2.3
 scikit-learn== 0.24.1
 scikit-image==0.17.2
 scipy==1.4.1