BUG: pandas 1.3.0 is only available for python 3.7
- [x] I have checked that this issue has not already been reported.

- [x] I have confirmed this bug exists on the latest version of pandas.

- [ ] (optional) I have confirmed this bug exists on the master branch of pandas.

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#### Problem description

Using a package manager (pip 21.1.1 on python 3.8), pandas 1.3.0 is not installable.
This project has neither a source distribution nor any non-3.7 versions for the 1.3.0 version of pandas according to: https://pypi.org/project/pandas/#files

![image](https://user-images.githubusercontent.com/480845/124293910-22db4380-db25-11eb-8559-e10b0f2464ec.png)


#### Expected Output

`pip install pandas==1.3.0` would work if python 3.8 is platform.
