Fix test suite

[ericpre]

Fix test suite following hyperspy/exspy#10 and .

Progress of the PR

• Fix install exspy,
• Fix failing because of missing dependencies, surprisingly it wasn't caught in Fix test suite without optional dependencies #182
• [n/a] update docstring (if appropriate),
• [n/a] update user guide (if appropriate),
• add a changelog entry in the upcoming_changes folder (see upcoming_changes/README.rst),
• Check formatting of the changelog entry (and eventual user guide changes) in the docs/readthedocs.org:rosettasciio build of this PR (link in github checks)
• update tests,
• ready for review.

[codecov]

Codecov Report

Attention: 86 lines in your changes are missing coverage. Please review.

Comparison is base (ecf3d0f) 85.78% compared to head (3ff5c38) 86.02%.
Report is 7 commits behind head on main.

Files	Patch %	Lines
rsciio/emd/_emd_velox.py	84.02%	35 Missing and 30 partials ⚠️
rsciio/emd/_emd_ncem.py	92.11%	9 Missing and 10 partials ⚠️
rsciio/emd/_api.py	77.77%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #186      +/-   ##
==========================================
+ Coverage   85.78%   86.02%   +0.23%     
==========================================
  Files          79       81       +2     
  Lines       10365    10387      +22     
  Branches     2180     2253      +73     
==========================================
+ Hits         8892     8935      +43     
+ Misses        950      931      -19     
+ Partials      523      521       -2     

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