Bump min SDK, tighten dependencies, test wasm on 3.4 (#277)

diff --git a/.github/workflows/test-package.yml b/.github/workflows/test-package.yml
index b60953e..33ab69f 100644
--- a/.github/workflows/test-package.yml
+++ b/.github/workflows/test-package.yml
@@ -47,7 +47,7 @@
       matrix:
         # Add macos-latest and/or windows-latest if relevant for this package.
         os: [ubuntu-latest]
-        sdk: [3.2, dev]
+        sdk: [3.4, dev]
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
       - uses: dart-lang/setup-dart@f0ead981b4d9a35b37f30d36160575d60931ec30
@@ -62,5 +62,4 @@
       - run: dart test --platform chrome --compiler dart2js
         if: always() && steps.install.outcome == 'success'
       - run: dart test --platform chrome --compiler dart2wasm
-        # TODO: drop `dev` filter when dart2wasm is working on stable
-        if: always() && steps.install.outcome == 'success' && matrix.sdk == 'dev'
+        if: always() && steps.install.outcome == 'success'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2b6f25..c89049a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 ## 2.12.0-wip
 
-- Require Dart 3.2
+- Require Dart 3.4
 
 ## 2.11.0
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 0448d37..8726f0f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,17 +4,17 @@
 repository: https://github.com/dart-lang/async
 
 environment:
-  sdk: ^3.2.0
+  sdk: ^3.4.0
 
 dependencies:
   collection: ^1.15.0
-  meta: ^1.1.7
+  meta: ^1.3.0
 
 dev_dependencies:
   dart_flutter_team_lints: ^3.0.0
   fake_async: ^1.2.0
   stack_trace: ^1.10.0
-  test: ^1.16.0
+  test: ^1.16.6
 
 topics:
 - async