Add v5

[odan]

Changes compared to the initial PR for Slim 5.

Added

• Implemented RequestHandlerInterface in the App class.

• New middlewares for error handling with content negotiation:

  • HtmlExceptionMiddleware
  • JsonExceptionMiddleware
  • XmlExceptionMiddleware
  • PlainTextExceptionMiddleware
  • ErrorExceptionMiddleware to convert PHP errors into ErrorException.
  • Shared ExceptionMiddlewareTrait for reusable error-handling logic.

• New middlewares for request body parsing (replacing the BodyParsingMiddleware):

  • JsonBodyParserMiddleware
  • XmlBodyParserMiddleware
  • FormUrlEncodedBodyParserMiddleware

• Added check for supported body parser handlers.

Changed

• Refactored the entire error-handling concept:
  • Replaced old error renderers with new middleware-based architecture.
  • Renamed ErrorHandlingMiddleware to ErrorExceptionMiddleware.
  • Updated HeadMethodMiddleware to use StreamFactoryInterface.

Removed

• Old error renderers:

  • HtmlExceptionRenderer
  • JsonExceptionRenderer
  • XmlExceptionRenderer
  • PlainTextExceptionRenderer

• ExceptionHandlingMiddleware and ExceptionRendererTrait

• Utility class JsonRenderer

• BodyParsingMiddleware

[coveralls]

coverage: 98.808% (+0.1%) from 98.663%
when pulling b22b0d1 on odan:5.x
into 89b8de3 on slimphp:5.x.

[akrabat]

Looks promising.