Deploy to Heroku like wercker/step-heroku-deploy, but this step use Heroku Platform API instead of heroku toolbelt.
This step do not support run option. If you want to run a command on heroku after deployment, use Heroku Release Phase.

• key (required) Heroku API Key.
• app-name (required) Heroku application name.
• version (optional) Heroku application version for this deployment. Default ${WERCKER_GIT_COMMIT}.
• source-blob (optional) Path to the source archive.
  If left empty, the archive created by git archive --format=tar.gz -o source-blob.tar.gz HEAD is used.

deploy:
  steps:
    - odk211/heroku-platform-api-deploy:
        key: ${HEROKU_KEY}
        app-name: ${HEROKU_APP_NAME}