Make Symfony 4.4 minimum version + Many Minor Code Generation Fixes

Hi Makers!

This release contains an overhaul of our testing system, which allowed us to find and fix various code generation bugs, mostly related to generating deprecated code on newer Symfony versions. In other words, it's a nice release.

v1.36.0

November 16th, 2021

Feature

• #1010 - Raising minimum Symfony version to 4.4 & refactoring of internal test classes - @weaverryan

Bug Fix

• #1010 - Various fixes for deprecated code that was generated & fixes for Symfony 6 - @weaverryan
• #993 - Avoid iterating on null for DoctrineBundle 2.2 and lower - @weaverryan
• #1004 - Fix FQCN of 'security.authentication.success' event - @AlexBevilacqua

Diff: v1.35.0...v1.36.0

Happy making!