Switching to new gradle action. Added changeset for close change.

Author: Chriztiaan

.changeset/light-oranges-compete.md

@@ -0,0 +1,5 @@
+---
+'@powersync/op-sqlite': minor
+---
+
+`close()` is now async, which allows clients to use it with `await`.

.github/workflows/test-simulators.yaml

@@ -20,8 +20,8 @@ jobs:
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
 
-      - name: Gradle Cache
-        uses: gradle/gradle-build-action@v2
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
 
       - name: AVD Cache
         uses: actions/cache@v3