Tasks: - [ ] fix https://github.com/diffpy/diffpy.srfit/issues/90 - [ ] remove pinning and warnings - [ ] pre-release on test PyPI - [ ] pre-release on real PyPI - [ ] submit for conda-forge recipe review - [ ] release on PyPI - [ ] release on conda-forge - [ ] close https://github.com/diffpy/diffpy.srfit/issues/86