Expect failures due to numerical precision in miniball.

[bdice]

Description

Until #179 is fixed, I added an xfail to the affected tests of bounding spheres for polyhedra. This ensures that library development is not stalled indefinitely due to a complex problem. See #179, #178 for details.

Types of Changes

• Documentation update
• Bug fix
• New feature
• Breaking change¹

¹The change breaks (or has the potential to break) existing functionality.

Checklist:

• I am familiar with the Contributing Guidelines.
• I agree with the terms of the Contributor Agreement.
• The changes introduced by this pull request are covered by existing or newly introduced tests.
• I have updated the changelog and the credits.

[bdice]

There are additional flaky test failures here. I am not able to invest the time to diagnose these but I will xfail those too.

edit: it was just hypothesis deadlines, not flaky failures. I extended their deadlines.

[codecov]

Codecov Report

Merging #183 (0177e7f) into master (429f494) will not change coverage.
The diff coverage is n/a.

❗ Current head 0177e7f differs from pull request most recent head f4a1cf8. Consider uploading reports for the commit f4a1cf8 to get more accurate results

@@           Coverage Diff           @@
##           master     #183   +/-   ##
=======================================
  Coverage   54.45%   54.45%           
=======================================
  Files          27       27           
  Lines        2628     2628           
=======================================
  Hits         1431     1431           
  Misses       1197     1197           

[janbridley]

Looks good to me - thank you for this patch!