Set SDK version to 3.0 stable (#573)

diff --git a/.github/workflows/test-package.yml b/.github/workflows/test-package.yml
index b739392..6200394 100644
--- a/.github/workflows/test-package.yml
+++ b/.github/workflows/test-package.yml
@@ -19,7 +19,7 @@
     strategy:
       fail-fast: false
       matrix:
-        sdk: [3.0.0-417.0.dev] # TODO(#554)
+        sdk: [3.0.0]
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
@@ -44,7 +44,7 @@
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
         with:
-          sdk: 3.0.0-417.0.dev # TODO(#554)
+          sdk: 3.0.0
       - name: Install dependencies
         run: dart pub get
       - name: Install libclang-14-dev
@@ -61,7 +61,7 @@
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
         with:
-          sdk: 3.0.0-417.0.dev # TODO(#554)
+          sdk: 3.0.0
       - name: Install dependencies
         run: dart pub get
       - name: Build test dylib and bindings
@@ -83,7 +83,7 @@
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
       - uses: dart-lang/setup-dart@d6a63dab3335f427404425de0fbfed4686d93c4f
         with:
-          sdk: 3.0.0-417.0.dev # TODO(#554)
+          sdk: 3.0.0
       - name: Install dependencies
         run: dart pub get
       - name: Build test dylib and bindings
diff --git a/example/c_json/pubspec.yaml b/example/c_json/pubspec.yaml
index 8eb2a37..3301013 100644
--- a/example/c_json/pubspec.yaml
+++ b/example/c_json/pubspec.yaml
@@ -5,7 +5,7 @@
 name: c_json_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/example/ffinative/pubspec.yaml b/example/ffinative/pubspec.yaml
index 1d57788..ef452f8 100644
--- a/example/ffinative/pubspec.yaml
+++ b/example/ffinative/pubspec.yaml
@@ -5,7 +5,7 @@
 name: ffinative_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/example/libclang-example/pubspec.yaml b/example/libclang-example/pubspec.yaml
index d7503f0..9d7e8ab 100644
--- a/example/libclang-example/pubspec.yaml
+++ b/example/libclang-example/pubspec.yaml
@@ -5,7 +5,7 @@
 name: libclang_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/example/objective_c/pubspec.yaml b/example/objective_c/pubspec.yaml
index 5e5c43b..4cedaa3 100644
--- a/example/objective_c/pubspec.yaml
+++ b/example/objective_c/pubspec.yaml
@@ -5,7 +5,7 @@
 name: objective_c_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/example/shared_bindings/pubspec.yaml b/example/shared_bindings/pubspec.yaml
index d5a9c38..2f270f1 100644
--- a/example/shared_bindings/pubspec.yaml
+++ b/example/shared_bindings/pubspec.yaml
@@ -5,7 +5,7 @@
 name: shared_bindings
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   cli_util: ^0.4.0
diff --git a/example/simple/pubspec.yaml b/example/simple/pubspec.yaml
index 29c4a1b..ea43572 100644
--- a/example/simple/pubspec.yaml
+++ b/example/simple/pubspec.yaml
@@ -5,7 +5,7 @@
 name: simple_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/example/swift/pubspec.yaml b/example/swift/pubspec.yaml
index 31c3aaf..07d93eb 100644
--- a/example/swift/pubspec.yaml
+++ b/example/swift/pubspec.yaml
@@ -5,7 +5,7 @@
 name: swift_example
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1
diff --git a/pubspec.yaml b/pubspec.yaml
index fcc83ca..c7e48f1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -13,7 +13,7 @@
  - codegen
 
 environment:
-  sdk: ">=3.0.0-417 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   ffi: ^2.0.1