jc: 1.10.7 -> 1.10.10
jc: 1.10.7 -> 1.10.10

Tests were removed from the PyPi distribution, so we need to fetch from GitHub now.

See https://github.com/kellyjonbrazil/jc/issues/58

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs