dio 5.3.3

What's new

• Fix failing requests throw DioExceptions with .unknown instead of .connectionError on SocketException.
• Removes the accidentally added options argument for Options.compose.
• Fix wrong formatting of multi-value header in BrowserHttpClientAdapter.
• Add warning in debug mode when trying to send data with a GET request in web.
• Reduce cases in which browsers would trigger a CORS preflight request.
• Add warnings in debug mode when using sendTimeout and onSendProgress with an empty request body.
• Fix receiveTimeout not working correctly on web.
• Fix ImplyContentTypeInterceptor can be removed by Interceptors.clear() by default.