Move command over to new v2 structure

[schlessera]

The following changes need to be made to move the command over to the v2 structure:

• [ ] Make sure the correct framework is required:

  composer require wp-cli/wp-cli:^2

• [ ] Require the testing framework as a dev dependency:

  composer require --dev wp-cli/wp-cli-tests:^2

• [ ] Use the .travis.yml file from wp-cli/wp-cli:

  wget https://raw.githubusercontent.com/wp-cli/wp-cli/master/.travis.yml

• [ ] Add the default script configuration to Composer file:

  "scripts": {
      "lint": "run-linter-tests",
      "phpcs": "run-phpcs-tests",
      "phpunit": "run-php-unit-tests",
      "behat": "run-behat-tests",
      "prepare-tests": "install-package-tests",
      "test": [
          "@lint",
          "@phpcs",
          "@phpunit",
          "@behat"
      ]
  },

• [ ] Remove scaffolded binary files:

  git rm bin/install-package-tests.sh
  git rm bin/test.sh

• [ ] Remove scaffolded Behat setup:

  git rm features/bootstrap/*
  git rm features/extra/*
  git rm features/steps/*

• [ ] Remove scaffolded Behat tags util script:

  git rm utils/behat-tags.php

• [ ] Add command packages that are needed for Behat tests as --dev dependencies. The following commands are already available, anything else needs to be explicitly required:
  • cli *
  • config *
  • core *
  • eval
  • eval-file
  • help
• [ ] Update all dependencies:

  composer update

• [ ] Optional - Add PHPCS rule set to enable CS & compatibility sniffing:

  wget https://raw.githubusercontent.com/wp-cli/wp-cli/master/phpcs.xml.dist

• [ ] Run and adapt tests to make sure they all pass:

  composer test