MassInstallAction: Install the CI workflow on this repository

[timholy]

This pull request sets up the CI workflow on this repository.

[codecov]

Codecov Report

Merging #102 (f45f403) into master (c2114a7) will decrease coverage by 1.28%.
The diff coverage is n/a.

❗ Current head f45f403 differs from pull request most recent head 90e576e. Consider uploading reports for the commit 90e576e to get more accurate results

@@            Coverage Diff             @@
##           master     #102      +/-   ##
==========================================
- Coverage   96.86%   95.58%   -1.29%     
==========================================
  Files           8        8              
  Lines         701      611      -90     
==========================================
- Hits          679      584      -95     
- Misses         22       27       +5     

Impacted Files	Coverage Δ
src/multinomials.jl	90.00% <0.00%> (-2.31%)	⬇️
src/partitions.jl	97.96% <0.00%> (-2.04%)	⬇️
src/permutations.jl	98.01% <0.00%> (-1.99%)	⬇️
src/combinations.jl	83.48% <0.00%> (-1.79%)	⬇️
src/youngdiagrams.jl	97.50% <0.00%> (-0.23%)	⬇️
src/numbers.jl	100.00% <0.00%> (ø)
src/factorials.jl	100.00% <0.00%> (ø)

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[anandijain]

@logankilpatrick looks like you have merge rights here. it'd be good to do this one, since it looks like CI hasn't been run in almost a year

[logankilpatrick]

@timholy does this still look okay to merge?