Merge pull request nisrulz#28 from ShinokiRyosei/fix/deprecated-argument

fix deprecated showDialog() argument

Author: nisrulz

tip_calculator/lib/main.dart

@@ -49,7 +49,7 @@ class TipCalculator extends StatelessWidget {
                   "Total: \$$total"));
 
           // Show dialog
-          showDialog(context: context, child: dialog);
+          showDialog(context: context, builder: (BuildContext context) => dialog);
         });
 
     Container container = new Container(

using_alert_dialog/lib/main.dart

@@ -32,7 +32,7 @@ class MyHomeState extends State<MyHome> {
                 // On press of the button
                 onPressed: () {
                   // Show dialog
-                  showDialog(context: context, child: dialog);
+                  showDialog(context: context, builder: (BuildContext context) => dialog);
                 }),
           ),
         ));