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