- Add missing override for init() method in MultiOutput class

Author: HiDaN4

lib/src/outputs/multi_output.dart

@@ -17,6 +17,11 @@ class MultiOutput extends LogOutput {
     return outputs;
   }
 
+  @override
+  void init() {
+    _outputs.forEach((o) => o.init());
+  }
+
   @override
   void output(OutputEvent event) {
     _outputs.forEach((o) => o.output(event));