flake.lock: Update
Flake lock file updates: • Updated input 'flake-utils': 'github:numtide/flake-utils/1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1' (2022-05-30) → 'github:numtide/flake-utils/bee6a7250dd1b01844a2de7e02e4df7d8a0a206c' (2022-06-24) • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/a72d7811be1162dd6804c4e36e5402d76fb6e921' (2022-06-21) → 'github:NixOS/nixpkgs/6141b8932a5cf376fe18fcd368cecd9ad946cb68' (2022-06-23) • Updated input 'pre-commit-hooks': 'github:cachix/pre-commit-hooks.nix/b7a131d06a23b02ab8eaa12d249d282f3590cbf9' (2022-06-22) → 'github:cachix/pre-commit-hooks.nix/db3bd555d3a3ceab208bed48f983ccaa6a71a25e' (2022-06-25) • Updated input 'rust-overlay': 'github:oxalica/rust-overlay/dd556d5a2f75522187198a4869f3c3a9d1aa62f7' (2022-06-22) → 'github:oxalica/rust-overlay/59a3a304c987dc65d2a33de0a77a1ae6ae777cd4' (2022-06-25)