This release is a backwards compatible release with 4.1.

• Experimental support for PSR11 compliant dependency injection container.

• Provide an API to enable custom application type classes to map provide concrete SQL types for a given SQL dialect. This would allow custom types to be used in fixture schema. See https://github.com/cakephp/bake/issues/567

• Add collation support to strings (https://github.com/cakephp/cakephp/issues/14546)

• Allow disabling field alias generation for subqueries/cte queries (https://github.com/cakephp/cakephp/issues/14203)

• Add constants for HTTP method names. Validate method names provided to Route constructor and Route::setMethods(). See 14908.

• RFC/Draft for DI (Dependency Injection) in CakePHP

• Deprecate the ? style placeholders supported by Text::insert(). We aren't providing any better functionality than sprintf() can here and our implementation will only be slower.

• Deprecate support for Query::distinct([]) with array parameters that simulates DISTINCT ON with GROUP BY. (https://github.com/cakephp/cakephp/issues/14791)