Support Express 5 types

[rabidpraxis]

Currently our recommended installation is failing type checks for typescript projects including express > 5.0.

error TS2769: No overload matches this call.
  The last overload gave the following error.
    Argument of type '(req: Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>, res: Response<any, Record<string, any>>, next: NextFunction) => void' is not assignable to parameter of type 'PathParams'.

12 app.use(Honeybadger.requestHandler);
           ~~~~~~~~~~~~~~~~~~~~~~~~~~

  node_modules/@types/express-serve-static-core/index.d.ts:157:5
    157     <
            ~
    158         P = ParamsDictionary,
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ...
    166         ...handlers: Array<RequestHandlerParams<P, ResBody, ReqBody, ReqQuery, LocalsObj>>
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    167     ): T;
        ~~~~~~~~~
    The last overload is declared here.

A workaround is to ignore the type errors with something like this:

app.use(Honeybadger.requestHandler as unknown as express.RequestHandler);

We should update the type definitions for Honeybadger.requestHandler and errorHandler to be compatible with Express 5’s middleware types, so TypeScript projects do not require unsafe type casts.