TST: RC test fixes

[jklenzing]

Description

Updates several bugs in the RC testing due to new behaviour at Github Actions.

• --no_binary is removed in latest pip
• updated flake8 expands definitions of E275 (no whitespace after keyword) to include raise
• Use --pre for pip to include pre-release versions at test pypi
• Use --extra-index-url to support wheel builds

pysatCDF tests removed for the time being (documented in #167).

Adds a yml to manage readthedocs

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

At github actions. Include manual run of pysat_rc workflow for this branch to test with pysat/pysat#1116

Checklist:

• Make sure you are merging into the develop (not main) branch
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• Add a note to CHANGELOG.md, summarizing the changes
• Update zenodo.json file for new code contributors

[jklenzing]

python 3.10 on windows expected to fail. Updates to pysat in the RC have fixed these. See: https://github.com/pysat/pysatNASA/actions/runs/4812031229

[jklenzing]

The readthedocs buld was failing, potentially caused by a new release of urllib3. See https://readthedocs.org/projects/pysatnasa/builds/20451047/

Added a readthedocs.yml according to the instructions, which appears to fix the issue. Note the default install was using python 3.7.

[jklenzing]

@JonathonMSmith is --no-cache-dir what we want here? Or do we need a different option?

[JonathonMSmith]

@jklenzing If we use --no-cache-dir I think pip will still favor wheels. If we want to avoid downloading wheels, then we need the --no-binary option as well. This is the --no-binary deprecation issue.

[jklenzing]

@jklenzing If we use --no-cache-dir I think pip will still favor wheels. If we want to avoid downloading wheels, then we need the --no-binary option as well. This is the --no-binary deprecation issue.

OK. looking through the code, the no-binary option is required to get pysatCDF to build correctly. However, since there are other problems with that and we've shut off the tests for now, we can just build the older numpy as usual.

[jklenzing]

@JonathonMSmith, can you take a look at the final config? This should be good to go, but I'd like another set of eyes on this.