Add Nightly and windows to CI

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.55% :warning:

Comparison is base (833b8bf) 81.47% compared to head (dd6735d) 80.92%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #61 +/- ## ========================================== - Coverage 81.47% 80.92% -0.55% ========================================== Files 25 25 Lines 680 692 +12 ========================================== + Hits 554 560 +6 - Misses 126 132 +6 ``` | [Files Changed](https://app.codecov.io/gh/jeremiahpslewis/AlgorithmicCompetition.jl/pull/61?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jeremiah) | Coverage Δ | | |---|---|---| | [src/AIAPC2020/run\_aiapc.jl](https://app.codecov.io/gh/jeremiahpslewis/AlgorithmicCompetition.jl/pull/61?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jeremiah#diff-c3JjL0FJQVBDMjAyMC9ydW5fYWlhcGMuamw=) | `100.00% <100.00%> (ø)` | | ... and [5 files with indirect coverage changes](https://app.codecov.io/gh/jeremiahpslewis/AlgorithmicCompetition.jl/pull/61/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jeremiah)

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