This is the first release candidate for 1.1.0rc0. If all goes well, we'll release pandas 1.1.0 in about two weeks.
See the whatsnew for a list of all the changes.
The release can be installed from PyPI
python -m pip install --upgrade --pre pandas==1.1.0rc0
Or from conda-forge
conda install -c conda-forge/label/pandas_rc pandas==1.1.0rc0
Please report any issues with the release candidate on the pandas issue tracker.