Branch for 3.4 development
Merge branch 'staging' into 3.4-dev
[imp] [33617]] New option for redirect plugin: Collect URLs
Close #3450
Initialize Composer into the repository
Install PHPMailer via Composer, unregister from CMS extensions
First pass on build script to deal with Composer files
Replace Framework Registry package with Composer install, bringing in its dependencies
Correct delete script
Replace Framework DI package with Composer install
Use Framework Compat package for JsonSerializable interface
Composer install the password-compat library
Move composer location to /libraries
Forgot to add new files
Move to libraries/vendor
Update file locations
Remove some extra files
Remove duplicate composer files
Remove more files
Tweaks
Remove vendor from admin manifest