[current results ui] Rebuild using prerelease Flutter 1.26

The deployed ui started failing, and rebuilding with most
current Flutter fixed the problem.

Change-Id: Ibe373723a01a92c7aa6431294cf233bacc7813df
Reviewed-on: https://dart-review.googlesource.com/c/dart_ci/+/181802
Reviewed-by: Alexander Thomas <athom@google.com>
diff --git a/current_results_ui/lib/main.dart b/current_results_ui/lib/main.dart
index 4b744f3..5551524 100644
--- a/current_results_ui/lib/main.dart
+++ b/current_results_ui/lib/main.dart
@@ -101,7 +101,7 @@
           title: const Text('Current Results',
               style: TextStyle(
                   fontSize: 24.0, color: Color.fromARGB(255, 63, 81, 181))),
-          backgroundColor: Colors.transparent,
+          backgroundColor: Colors.white,
           bottom: TabBar(
             tabs: [
               Tab(text: 'ALL'),
diff --git a/current_results_ui/pubspec.lock b/current_results_ui/pubspec.lock
index db1b87d..f30336a 100644
--- a/current_results_ui/pubspec.lock
+++ b/current_results_ui/pubspec.lock
@@ -7,28 +7,28 @@
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety"
+    version: "2.5.0-nullsafety.3"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety"
+    version: "2.1.0-nullsafety.3"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.2"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety"
+    version: "1.2.0-nullsafety.3"
   clippy:
     dependency: "direct main"
     description:
@@ -42,14 +42,14 @@
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety"
+    version: "1.1.0-nullsafety.3"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.2"
+    version: "1.15.0-nullsafety.5"
   convert:
     dependency: transitive
     description:
@@ -70,7 +70,7 @@
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety"
+    version: "1.2.0-nullsafety.3"
   fixnum:
     dependency: transitive
     description:
@@ -129,14 +129,14 @@
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety"
+    version: "0.12.10-nullsafety.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.2"
+    version: "1.3.0-nullsafety.6"
   nested:
     dependency: transitive
     description:
@@ -150,7 +150,7 @@
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety"
+    version: "1.8.0-nullsafety.3"
   pedantic:
     dependency: transitive
     description:
@@ -183,56 +183,56 @@
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety"
+    version: "1.8.0-nullsafety.4"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety"
+    version: "1.10.0-nullsafety.6"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety"
+    version: "2.1.0-nullsafety.3"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety"
+    version: "1.1.0-nullsafety.3"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety"
+    version: "1.2.0-nullsafety.3"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety"
+    version: "0.2.19-nullsafety.6"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.2"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.2"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0-0.0.dev <2.10.0"
+  dart: ">=2.12.0-0.0 <3.0.0"
   flutter: ">=1.16.0"