Fix segmented control demo

lib/codeviewer/code_segments.dart

@@ -15528,6 +15528,8 @@ class CodeSegments {
       TextSpan(style: codeStyle.baseStyle, text: ' children'),
       TextSpan(style: codeStyle.punctuationStyle, text: '['),
       TextSpan(style: codeStyle.baseStyle, text: 'currentSegment'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'value'),
       TextSpan(style: codeStyle.punctuationStyle, text: '],'),
       TextSpan(style: codeStyle.baseStyle, text: '\u000a              '),
       TextSpan(style: codeStyle.punctuationStyle, text: '),'),

lib/demos/cupertino/cupertino_segmented_control_demo.dart

@@ -84,7 +84,7 @@ class _CupertinoSegmentedControlDemoState
                 padding: const EdgeInsets.all(16),
                 height: 300,
                 alignment: Alignment.center,
-                child: children[currentSegment],
+                child: children[currentSegment.value],
               ),
             ],
           ),

macos/Podfile.lock

@@ -31,4 +31,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 6eac6b3292e5142cfc23bdeb71848a40ec51c14c
 
-COCOAPODS: 1.10.0
+COCOAPODS: 1.10.1

pubspec.lock

@@ -49,7 +49,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.6.0"
+    version: "2.6.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -654,4 +654,4 @@ packages:
     version: "3.1.0"
 sdks:
   dart: ">=2.12.0 <3.0.0"
-  flutter: ">=1.24.0-6.0.pre"
+  flutter: ">=2.2.0"

pubspec.yaml

@@ -4,6 +4,7 @@ repository: https://github.com/flutter/gallery
 version: 2.9.0+020900
 
 environment:
+  flutter: ^2.2.0
   sdk: ">=2.6.0 <3.0.0"
 
 dependencies: