Use github token if it exists.

.github/workflows/build.yaml

@@ -33,6 +33,8 @@ jobs:
       - name: Fetch latest dart_shared_library
         run: |
           dart ./tools/fetch_dart/bin/fetch_dart.dart --verbose
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Build Shared Library
         run: |
           cmake -DCMAKE_BUILD_TYPE=Release . -B "build"
@@ -50,9 +52,17 @@ jobs:
     continue-on-error: false
     steps:
       - uses: actions/checkout@v3
+      - uses: dart-lang/setup-dart@v1
       - uses: actions/download-artifact@v3
         with:
           path: artifacts
+      - run: dart pub get
+        working-directory: ./tools/fetch_dart
+      - name: Fetch latest dart_shared_library
+        run: |
+          dart ./tools/fetch_dart/bin/fetch_dart.dart --verbose
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: "Create extension"
         run: |
           mkdir -p out/extension

tools/fetch_dart/bin/fetch_dart.dart

@@ -9,7 +9,7 @@ import 'package:path/path.dart' as path;
 
 final destDir = Directory('src/dart_dll');
 final destBinDir = Directory(path.join(destDir.path, 'bin/release'));
-final destIncludeDir = Directory(path.join(destDir.path, 'bin/release'));
+final destIncludeDir = Directory(path.join(destDir.path, 'include'));
 
 ArgParser buildParser() {
   return ArgParser()
@@ -138,7 +138,11 @@ void _fetchLocal(String localPath, Logger l) async {
 }
 
 void _fetchFromGithub(String? version, Logger l) async {
-  final github = GitHub();
+  final authToken = Platform.environment['GITHUB_TOKEN'];
+  final auth = authToken == null
+      ? Authentication.anonymous()
+      : Authentication.withToken(authToken);
+  final github = GitHub(auth: auth);
   final repoSlug = RepositorySlug('fuzzybinary', 'dart_shared_library');
 
   final Release downloadRelease;