module.exports = [
  'ie/7..latest',
  'chrome/latest',
  'firefox/latest',
  'safari/5..latest',
  'android/4.4..latest',
  'iphone/latest',
  'ipad/latest'
]

module.exports = [
  'ie/8..latest',
  'chrome/latest',
  'firefox/latest',
  'safari/6..latest',
  'android/4.4..latest',
  'iphone/latest',
  'ipad/latest'
]

Drop support for IE7 and Safari 5
Drop support for IE7 and Safari 5