licensor: "Fix" integration test for 2021
licensor: "Fix" integration test for 2021

* Use latest version from master (as of 2021-02-03)
  * Apply patch from https://github.com/raftario/licensor/pull/28 that
    "fixes" the `license_and_name` test by bumping the year from 2020
    to 2021, until the test implementation can be properly addressed

  * This also includes a security update from
    https://github.com/raftario/licensor/pull/8

  * Instead of adding 2 more patches (one for the test fix, one for the
    security update), using the latest commit from master seems to make
    the most sense for now

  * remove fetchpatch from inputs

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