crates-test 0.0.4

Testing playground for crates.io. Wouldn't it be nice to have a staging area? Bump [crates.io issue #1503](https://github.com/rust-lang/crates.io/issues/1503) A replacement of the #[test] attribute that initializes the env_logger before running tests.
Documentation
// lib.rs

// *************************************************************************
// * Copyright (C) 2018 Daniel Mueller (deso@posteo.net)                   *
// *                                                                       *
// * This program is free software: you can redistribute it and/or modify  *
// * it under the terms of the GNU General Public License as published by  *
// * the Free Software Foundation, either version 3 of the License, or     *
// * (at your option) any later version.                                   *
// *                                                                       *
// * This program is distributed in the hope that it will be useful,       *
// * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
// * GNU General Public License for more details.                          *
// *                                                                       *
// * You should have received a copy of the GNU General Public License     *
// * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
// *************************************************************************


#[cfg(test)]
mod tests {
  #[test]
  fn it_works() {
      assert_eq!(2 + 2, 4);
  }
}