Yii HTTP Runner 3.2

Minor version of Yii HTTP Runner were tagged. In this version made several changes and improvements.

• Add HttpApplicationRunner::runAndGetResponse() method that returns response without emit.
• Add $emitter, $useRemoveBodyByStatusMiddleware, $useContentLengthMiddleware and $useHeadRequestMiddleware parameters to HttpApplicationRunner constructor.
• Minor refactor internal class RequestFactory: explicitly mark read-only properties and add type to parameter of create() method.
• Don't remove Content-Length header if it is set and emit is called without body.