Motivation for this change

New purescript 0.13.6 version came out this week. Changelog:
https://github.com/purescript/purescript/releases/tag/v0.13.6

Using following SHA256 from nix-prefetch-url for corresponding MacOS binary:

$ nix-prefetch-url https://github.com/purescript/purescript/releases/download/v0.13.6/macos.tar.gz
[5.8 MiB DL]
path is '/nix/store/b1i0yhyim0nsfayf9qhkvmpv3fi14xxw-macos.tar.gz'
04kwjjrriyizpvhs96jgyx21ppyd1ynblk24i5825ywxlw9hja25

Using following SHA256 from nix-prefetch-url for corresponding Linux 64-bit binary:

$ nix-prefetch-url https://github.com/purescript/purescript/releases/download/v0.13.6/linux64.tar.gz
[10.0 MiB DL]
path is '/nix/store/k5iz3vmmqla5r2niwygls8j7ghhskf0r-linux64.tar.gz'
012znrj32aq96qh1g2hscdvhl3flgihhimiz40agk0dykpksblns

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.