Make e-antic pip-installable

[saraedum]

Checklist

• [x] Added an entry in doc/news/.
• [ ] Added a test/benchmark for this change:
  • [ ] Run pip install from sdist with/without --user
  • [ ] Run pip install from source with/without --user
  • [ ] Import pyeantic from pip-installed libeantic & pyeantic.
• [ ] Add upload to PyPI to rever scripts
• [ ] Help pyeantic find pip-installed libeantic

Dependencies

• [x] sagemath-dev images for 9.3 and 9.4
• [x] make antic pip-installable https://github.com/wbhart/antic/pull/69

[codecov[bot]]

Codecov Report

Merging #222 (18c9aa7) into master (20cfd19) will decrease coverage by 0.04%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #222      +/-   ##
==========================================
- Coverage   92.05%   92.00%   -0.05%     
==========================================
  Files         105      105              
  Lines        2064     2064              
==========================================
- Hits         1900     1899       -1     
- Misses        164      165       +1     

Impacted Files	Coverage Δ
libeantic/e-antic/renf_class.hpp	50.00% <0.00%> (-50.00%)	:arrow_down:

---

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 20cfd19...18c9aa7. Read the comment docs.

[saraedum]

We probably don't want to do this anymore. Instead, the current thinking is that we should try to make our SPKGs work and then cibuildwheel with SageMath in the same way that https://trac.sagemath.org/ticket/31588 is planning to.