eva: 0.2.7 -> 0.3.0
eva: 0.2.7 -> 0.3.0

Changes: https://github.com/nerdypepper/eva/compare/v0.2.7...v0.3.0

I ha to go back to using `fetchFromGitHub` because `0.3.0` is not
published on crates.io (cc @NerdyPepper).

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