Add option to change Badge border radius

lib/widgets/badge.dart

@@ -2,8 +2,12 @@ import 'package:flutter/material.dart';
 
 class Badge extends StatelessWidget {
   final Widget child;
+  final BorderRadiusGeometry borderRadius;
 
-  Badge({@required this.child});
+  Badge({
+    @required this.child,
+    this.borderRadius = const BorderRadius.all(Radius.circular(5)),
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -13,7 +17,7 @@ class Badge extends StatelessWidget {
       height: 25,
       decoration: BoxDecoration(
         color: theme.accentColor,
-        borderRadius: BorderRadius.all(Radius.circular(5)),
+        borderRadius: borderRadius,
       ),
       child: Padding(
         padding: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),