feat: ❄️ add Nix flake and update dependencies - #23

  4 files  ±0    4 suites  ±0   2m 5s ⏱️ +9s
 37 tests ±0   36 ✅ ±0  1 💤 ±0  0 ❌ ±0 
128 runs  ±0  126 ✅ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit a839559. ± Comparison against earlier commit 8292675.