Prepare for release of v5.0.0

[chrispyles]

No description provided.

[codecov]

Codecov Report

Patch coverage: 84.38% and project coverage change: +6.27 🎉

Comparison is base (1a72d46) 73.97% compared to head (8dbccac) 80.24%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #669      +/-   ##
==========================================
+ Coverage   73.97%   80.24%   +6.27%     
==========================================
  Files          64       62       -2     
  Lines        3984     4034      +50     
==========================================
+ Hits         2947     3237     +290     
+ Misses       1037      797     -240     

Impacted Files	Coverage Δ
otter/export/__init__.py	78.94% <ø> (ø)
otter/export/exporters/via_html.py	26.19% <0.00%> (-5.52%)	⬇️
otter/plugins/abstract_plugin.py	73.91% <ø> (-2.09%)	⬇️
otter/export/exporters/via_latex.py	79.54% <16.66%> (+4.54%)	⬆️
otter/grade/utils.py	41.66% <18.18%> (-47.62%)	⬇️
otter/run/run_autograder/utils.py	33.33% <20.00%> (-66.67%)	⬇️
...tter/run/run_autograder/runners/abstract_runner.py	75.34% <23.52%> (-1.59%)	⬇️
otter/check/utils.py	66.08% <66.66%> (-0.29%)	⬇️
otter/assign/__init__.py	83.33% <83.33%> (+3.76%)	⬆️
otter/generate/utils.py	80.00% <83.33%> (-12.86%)	⬇️
... and 20 more

... and 5 files with indirect coverage changes

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