Total issues resolved: **19** - [2787: 4.x - Add an advanced callable resolver](https://github.com/slimphp/Slim/pull/2787) thanks to @adriansuter - [2789: Cookie-header detection must be case insensitive](https://github.com/slimphp/Slim/pull/2789) thanks to @mapogolions - [2791: Add `inferPrivatePropertyTypeFromConstructor` to phpstan](https://github.com/slimphp/Slim/pull/2791) thanks to @adriansuter - [2793: Configure the application via a container](https://github.com/slimphp/Slim/pull/2793) thanks to @mnapoli - [2796: Fix http message format](https://github.com/slimphp/Slim/pull/2796) thanks to @mapogolions - [2798: Add BodyParsingMiddleware](https://github.com/slimphp/Slim/pull/2798) thanks to @akrabat - [2800: Make null comparisons more clear in ErrorHandler](https://github.com/slimphp/Slim/pull/2800) thanks to @RyanNerd - [2801: 4.x - Add setLogErrorRenderer() to ErrorHandler](https://github.com/slimphp/Slim/pull/2801) thanks to @RyanNerd - [2802: Incorrect search of a header in stack](https://github.com/slimphp/Slim/pull/2802) thanks to @mapogolions - [2803: Emit non seekable streams](https://github.com/slimphp/Slim/pull/2803) thanks to @mapogolions - [2806: Simplify prepare arguments](https://github.com/slimphp/Slim/pull/2806) thanks to @mapogolions - [2807: 4.x - Add check for Slim callable notation if no resolver given](https://github.com/slimphp/Slim/pull/2807) thanks to @adriansuter - [2809: 4.x - Eliminate a duplicate code via HOF](https://github.com/slimphp/Slim/pull/2809) thanks to @mapogolions - [2811: 4.x - Remove `DeferredCallable`](https://github.com/slimphp/Slim/pull/2811) thanks to @adriansuter - [2812: 4.x - Travis-CI: Require coveralls library only if in analysis mode](https://github.com/slimphp/Slim/pull/2812) thanks to @adriansuter - [2813: 4.x - Avoid that Travis-CI runs phpunit two times in analysis mode](https://github.com/slimphp/Slim/pull/2813) thanks to @adriansuter - [2814: 4.2 - Use PHP 7.3 for analysis on Travis](https://github.com/slimphp/Slim/pull/2814) thanks to @adriansuter - [2816: 4.x - Fix RouteCollectorProxy::redirect() Bug](https://github.com/slimphp/Slim/pull/2816) thanks to @l0gicgate - [2817: 4.x - MiddlewareDispatcherInterface](https://github.com/slimphp/Slim/pull/2817) thanks to @l0gicgate