Build fixes

[ronanstokes-db]

Proposed changes

Fixes for development build process

Types of changes

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

• [x] Bug fix (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)
• [ ] Change to tutorials, tests or examples
• [ ] Non code change (readme, images or other non-code assets)
• [ ] Documentation Update (if none of the other choices apply)

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.

• [x] Lint and unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] Submission does not reduce code coverage numbers
• [x] Submission does not increase alerts or messages from prospector / lint

Further comments

A recent change to the package rst2pdf causes the build to fail. However as this is not used in building wheel or docs, we can remove it from the build environment.

[codecov[bot]]

Codecov Report

Merging #213 (c81cc66) into master (80ca02b) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #213   +/-   ##
=======================================
  Coverage   91.97%   91.97%           
=======================================
  Files          23       23           
  Lines        2680     2680           
  Branches      452      452           
=======================================
  Hits         2465     2465           
  Misses        128      128           
  Partials       87       87           

Impacted Files	Coverage Δ
dbldatagen/_version.py	100.00% <100.00%> (ø)