Update dio dependency to 5.7.0.

Author: amugofjava

pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
   archive: ^3.5.1
   convert: ^3.0.1
   crypto: ^3.0.1
-  dio: ^5.4.3+1
+  dio: ^5.7.0
   rss_dart: ^1.0.9
   meta: ^1.12.0