chore(deps): update dependency pytest-doctestplus to v1.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pytest-doctestplus	1.5.0 -> 1.6.0

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Release Notes

scientific-python/pytest-doctestplus (pytest-doctestplus)

v1.6.0

Compare Source

==================

• Fixing directives that should not have any content and therefore fixing
  previously crashing sphinx builds. Using these directives with a content
  now results an error. [#​311]

• Ensure that tests skipped with __doctest_skip__ and
  __doctest_requires__ show up as skipped tests in Pytest's output. [#​312]

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Configuration

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Test Results

    56 files  ±0      56 suites  ±0   25m 22s ⏱️ -12s
 2 256 tests ±0   2 256 ✅ ±0  0 💤 ±0  0 ❌ ±0 
64 590 runs  ±0  64 590 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 5e49238. ± Comparison against base commit 1b0516d.

♻️ This comment has been updated with latest results.