Docs fix

[LiamPattinson]

Proposed changes

Rather than requiring an update to CadQuery's master version, which diverges quite significantly from v2.1, this pull request keeps CadQuery at 2.1 but tries to fix the python version and pyparsing version for the readthedocs build.

Types of changes

What types of changes does your code introduce to the Paramak?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code refactoring
• Documentation Update (if none of the other choices apply)
• New tests

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[codecov]

Codecov Report

Merging #168 (deaacb9) into develop (983daa0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #168   +/-   ##
========================================
  Coverage    97.67%   97.67%           
========================================
  Files           77       77           
  Lines         4824     4824           
========================================
  Hits          4712     4712           
  Misses         112      112           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 983daa0...deaacb9. Read the comment docs.

[shimwell]

Nice, pinning pyparsing to 2.4.7 sounds like a good plan, I guess this means we can use CQ 2.1 and avoid those tessellation errors.

Looking forward to seeing if the docs work out

[shimwell]

Congrats @LiamPattinson looks like the ~ solved it. Shall I merge this in

[LiamPattinson]

Amazing! I'd almost lost hope on solving this one. Since making changes to setup.cfg, I'm not sure if the changes to environment.yml are needed anymore. Do you think it's worth reverting environment.yml, or should we just merge as-is?

[shimwell]

I would merge as is and if further tinkering is beneficial perhaps best on another PR. Mission complete for this one 🎉

[shimwell]

@LiamPattinson I just noticed a similar method on CadQuery https://github.com/CadQuery/cadquery/blob/e0b4c942ab382cac38bb462b9d878f8863a88ae7/environment.yml#L10