Update kotlin to 1.3.70

Test: ./gradlew bOS
Change-Id: Iabc24cc5deb43fcae60e2ad25ed2a38e42386ec5
diff --git a/sqlite/sqlite-inspection/build.gradle b/sqlite/sqlite-inspection/build.gradle
index 13a1efa..e284bb4 100644
--- a/sqlite/sqlite-inspection/build.gradle
+++ b/sqlite/sqlite-inspection/build.gradle
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 import static androidx.build.dependencies.DependenciesKt.*
 import androidx.build.LibraryGroups
 import androidx.build.LibraryVersions
@@ -63,3 +66,10 @@
         main.resources.srcDirs += "src/main/proto"
     }
 }
+
+// Allow usage of Kotlin's @OptIn.
+tasks.withType(KotlinCompile).configureEach {
+    kotlinOptions {
+        freeCompilerArgs += ["-Xopt-in=kotlin.RequiresOptIn"]
+    }
+}