Bump the version number and empty the changelog
Use class constants for `BackendUser::isAllowed()`
Merge branch 'release/3.2.0' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
Remove the redundant `FilesModel::findByPk()` entry from the UPGRADING.md file
Remove a redundant error control operator
Merge branch 'hotfix/3.2.4' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
	system/docs/UPGRADE.md
Merge branch 'hotfix/3.2.5' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
Merge branch 'hotfix/3.2.6' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
Merge branch 'hotfix/3.2.7' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
Merge branch 'hotfix/3.2.8' into develop

Conflicts:
	system/config/constants.php
	system/docs/CHANGELOG.md
Use composer to manage SwiftMailer and SimplePie
Manage the markdown parser via Composer as well
Support the "HAVING" command in the `Model\QueryBuilder` class (see #6446)
Add a `getModel()` method to modules, elements and hybrids (see #6492)
Convert slashes to hyphens in the `standardize()` function (see #6396)
Added a `DcaLoader` class to decouple the DCA loading process (see #5441)
Use the server's default time zone in the `config/defaults.php` file (see #6449)
Also handle `&` and `.` in the `standardize()` method (see #6396)
Do not combine .js and .css files when running in debug mode (see #6450)
Support editing the front end preview page via the "url" parameter (see #6471)