message: Fix quotes as per coding styleguide
diff: @@ -166,5 +166,5 @@ exports.randomHexString = (length) => {
  }
  exports.isHeroku = () => {
  - return process.env.NODE && process.env.NODE.indexOf("heroku") !== -1;
  + return process.env.NODE && process.env.NODE.indexOf('heroku') !== -1
  }
  