Require Dart 3, update lints (dart-lang/timing#33)

diff --git a/pkgs/timing/.github/workflows/test-package.yml b/pkgs/timing/.github/workflows/test-package.yml
index f689ff5..752aef4 100644
--- a/pkgs/timing/.github/workflows/test-package.yml
+++ b/pkgs/timing/.github/workflows/test-package.yml
@@ -20,7 +20,7 @@
     strategy:
       fail-fast: false
       matrix:
-        sdk: [2.18.0, dev]
+        sdk: [3.0.0, dev]
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
@@ -44,7 +44,7 @@
       matrix:
         # Add macos-latest and/or windows-latest if relevant for this package.
         os: [ubuntu-latest]
-        sdk: [2.18.0, dev]
+        sdk: [3.0.0, dev]
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
diff --git a/pkgs/timing/CHANGELOG.md b/pkgs/timing/CHANGELOG.md
index f7f3fbd..0c38a76 100644
--- a/pkgs/timing/CHANGELOG.md
+++ b/pkgs/timing/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.2-wip
+
+- Require Dart `3.0`.
+
 ## 1.0.1
 
 - Require Dart `2.14`.
diff --git a/pkgs/timing/lib/src/timing.dart b/pkgs/timing/lib/src/timing.dart
index fae19bd..049ba81 100644
--- a/pkgs/timing/lib/src/timing.dart
+++ b/pkgs/timing/lib/src/timing.dart
@@ -317,7 +317,7 @@
       return result
           // Break possible sync processing of future completion, so slice
           // trackers can be finished
-          .whenComplete(() => Future.value())
+          .whenComplete(Future.value)
           .whenComplete(() => _tracking = false) as T;
     } else {
       _tracking = false;
diff --git a/pkgs/timing/lib/timing.dart b/pkgs/timing/lib/timing.dart
index 0163e8d..5cb16d4 100644
--- a/pkgs/timing/lib/timing.dart
+++ b/pkgs/timing/lib/timing.dart
@@ -4,10 +4,10 @@
 
 export 'src/timing.dart'
     show
+        AsyncTimeTracker,
+        NoOpTimeTracker,
+        SimpleAsyncTimeTracker,
+        SyncTimeTracker,
         TimeSlice,
         TimeSliceGroup,
-        TimeTracker,
-        SyncTimeTracker,
-        SimpleAsyncTimeTracker,
-        AsyncTimeTracker,
-        NoOpTimeTracker;
+        TimeTracker;
diff --git a/pkgs/timing/pubspec.yaml b/pkgs/timing/pubspec.yaml
index 323c28e..f81c2fc 100644
--- a/pkgs/timing/pubspec.yaml
+++ b/pkgs/timing/pubspec.yaml
@@ -1,18 +1,18 @@
 name: timing
-version: 1.0.1
+version: 1.0.2-wip
 description: >-
   A simple package for tracking the performance of synchronous and asynchronous
   actions.
 repository: https://github.com/dart-lang/timing
 
 environment:
-  sdk: ">=2.14.0 <3.0.0"
+  sdk: ^3.0.0
 
 dependencies:
   json_annotation: ^4.3.0
 
 dev_dependencies:
   build_runner: ^2.0.0
-  dart_flutter_team_lints: ^0.1.0
+  dart_flutter_team_lints: ^1.0.0
   json_serializable: ^6.0.0
   test: ^1.0.0