Updating changelog and more optional ndim

[AndrewAnnex]

preparing for 4.0.1 release, also saw a lot of ndim's to make optional and updated test_wrapper to use a autouse pytest fixture to reduce some duplication of kclear calls

[pep8speaks]

Hello @AndrewAnnex! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file spiceypy/spiceypy.py: No issues found.

• In the file spiceypy/tests/test_wrapper.py: No issues found.

Comment last updated at 2021-05-31 15:24:16 UTC

[codecov]

Codecov Report

Merging #411 (354bb60) into main (dca3b8a) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #411      +/-   ##
==========================================
- Coverage   99.88%   99.87%   -0.01%     
==========================================
  Files          12       12              
  Lines       15206    14731     -475     
==========================================
- Hits        15188    14713     -475     
  Misses         18       18              

Impacted Files	Coverage Δ
spiceypy/tests/test_wrapper.py	100.00% <ø> (ø)
spiceypy/spiceypy.py	99.69% <100.00%> (+<0.01%)	⬆️

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