formats:
    - htmlzip
build:
    image: latest
python:
    version: 3.7
    pip_install: true
    extra_requirements:
        - docs

formats:
    - htmlzip
python:
    version: 3
    pip_install: true
    extra_requirements:
        - docs

Revert "Try using 3.7 on rtfd"
Revert "Try using 3.7 on rtfd"

This reverts commit 97636b4a93ffcd78e928a0fa085fb95f1bd22e6d.
