Wrap dio_link executeDioRequest in try-catch block

[amritnew]

The request function has a return type of Stream<Response>. As a result, the catch block will use Stream.error() to asynchronously propagate the exception.

[knaeckeKami]

can you show in code how this would actually result in a different behavior? from what i see, this behaves exactly as before

[anshul-arora]

@knaeckeKami
The above fix seems to fix the issue i was facing with bad network connectivity

What i see from the code is that _executeDioRequest method was throwing an exception, which was not being catched and yielded by the request method

thanks @amritnew for the fix

Fatal Exception: FlutterError LinkException(DioException [connection error]: The connection errored: Failed host lookup: 'xxx.xxx.xx.com' This indicates an error which most likely cannot be solved by the library. Error: SocketException: Failed host lookup: 'xxx.xxx.xx.com' (OS Error: nodename nor servname provided, or not known, errno = 8), #0 DioMixin.fetch (package:dio/src/dio_mixin.dart:520) <asynchronous suspension> #1 DioLink._executeDioRequest (package:gql_dio_link/src/dio_link.dart:198) <asynchronous suspension> #2 DioLink.request (package:gql_dio_link/src/dio_link.dart:71) <asynchronous suspension> )