Add partial and degree

[Kolaru]

Fix MakieOrg/Makie.jl#1991

[codecov-commenter]

Codecov Report

Merging #63 (be07b89) into master (b3a224f) will decrease coverage by 0.09%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master      #63      +/-   ##
==========================================
- Coverage   81.98%   81.88%   -0.10%     
==========================================
  Files           9        9              
  Lines         505      508       +3     
==========================================
+ Hits          414      416       +2     
- Misses         91       92       +1     

Impacted Files	Coverage Δ
src/engine/computer_modern_data.jl	100.00% <ø> (ø)
src/engine/layout.jl	91.79% <75.00%> (-0.58%)	⬇️

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