[5.x] Update the branch 5.x with the lastest updates on the dev branch

<table>
  <tr>
    <th>Q</th><th>A</th>
  </tr>
  <tr>
    <td>Bug fix?</td><td>yes</td>
  </tr>
  <tr>
    <td>New feature?</td><td>yes</td>
  </tr>
  <tr>
    <td>BC breaks?</td><td>probably</td>
  </tr>
  <tr>
    <td>Tests pass?</td><td>yes</td>
  </tr>
  <tr>
    <td>License?</td><td>MIT</td>
  </tr>
</table>

Uses only dev branch updates for Decoda version 5.