Support Route Generation For Patch #486
Description
To use shelf_router_generater with annotations, one can use the syntax like @Route.get('route').. This is currently not supported for PATCH method, even though patch is supported by the Router. This is due to it not being specified in the routes file. It should be added accordingly to avoid a difference in syntax. Currently it has to be specified as @route('PATCH', route) which is inconsistent.