v5.3.9

### ⚠️  IMPORTANT: Later versions of Snipe-IT will require PHP 7.4 or greater. It is highly recommended you upgrade your version of PHP NOW. 

(This is a requirement in order for us to be able to pull forward the dependencies that will allow us to support PHP8 and beyond moving forward.)

## New in v5.3.9

- Added additional gate for selectlists [#10662]
- Fixed issue where bulk edit edits were not showing in Asset's history nor Activity report [sc-16550] [#10586]
- Fixed audit email template formatting
- Fixed LDAP active flag [#10563]
- Fixed "secure hostnames" feature for subdirectory-based Snipe-IT installs 
- Temp fix for weird JSON format in history
- Added initial support for default values in checkboxes custom fields
- Fixed `/hardware/{id}/checkin` API response on error where it was erroneously sending a "success" message on failure
- Added custom date to checkin actionlogs and show it in the history of the asset tab
- Disallow invalid JSON requests via API
- Fixed validation if `$model` and `$model->category` exist before return the `checkin_email` property
- Fixed 500 that would occur if the user who audited an item no longer exists in the system (hard-deleted)

For a full list of changes, [see the complete changelog](https://github.com/snipe/snipe-it/compare/v5.3.8...v5.3.9).

### Upgrading

For general upgrading instructions, [click here](https://snipe-it.readme.io/docs/upgrading). Users who installed Snipe-IT via Git (recommended) can just run `php upgrade.php`.