run_constrain antlr-python-runtime, remove setuptools runtime dep

[bollwyvl]

Checklist

• [x] Used a fork of the feedstock to propose changes

• [x] Bumped the build number (if the version is unchanged)

• [ ] Reset the build number to 0 (if the version changed)

• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)

• [x] Ensured the license file is being packaged.

• fixes #20 by removing setuptools as a runtime dep

• as per https://github.com/sympy/sympy/issues/17629#issuecomment-533688907, this adds a run_constrained for antlr-python-runtime

  • 4.8 is ready to release, but want to make sure this is in order

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[bollwyvl]

:tada: