message: Update year to 2019
diff: <p>Postcodes.io is available under the MIT Licence</p>
  <p>Great Britain postcode data may be used under the terms of the OS OpenData licence</p>
  <p>Northern Ireland postcode data (i.e. beginning "BT") may be used under the terms of the ONSPD licence. Non-commercial use is free. Commercial use requires a licence from NI Land &amp; Property Services</p>
  - <p>Contains Ordnance Survey data &copy; Crown copyright and database right 2018</p>
  - <p>Contains Royal Mail data &copy; Royal Mail copyright and database right 2018</p>
  - <p>Contains National Statistics data &copy; Crown copyright and database right 2018</p>
  + <p>Contains Ordnance Survey data &copy; Crown copyright and database right 2019</p>
  + <p>Contains Royal Mail data &copy; Royal Mail copyright and database right 2019</p>
  + <p>Contains National Statistics data &copy; Crown copyright and database right 2019</p>
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