Add strict concurrency tests

Author: simolus3

.github/workflows/build_and_test.yaml

@@ -14,6 +14,12 @@ jobs:
         uses: maxim-lobanov/setup-xcode@v1
         with:
           xcode-version: latest-stable
+
+      - name: Test with strict concurrency
+        run: |
+          swift build -Xswiftc -strict-concurrency=complete
+          swift test -Xswiftc -strict-concurrency=complete
+
       - name: Build and Test
         run: |
           xcodebuild test -scheme PowerSync-Package -destination "platform=iOS Simulator,name=iPhone 16"