Update dev_utils.dart

[SuperY]

[SuperY]

Sorry for not adding the description in time. I used Dio to replace Major's default http Link, so in the case of exceptions such as disconnection, the conversion of anomalies to JSON will be problematic, and whether this can be made compatible by try..catch.

[SuperY]

Or in non-debug mode, pprint() should just return. Check if debug mode by kDebugMode.