[sembast] fix onCountSync

sembast/lib/src/query_ref_impl.dart

@@ -323,5 +323,5 @@ extension SembastQueryRefSyncExtension<K, V> on QueryRef<K, V> {
   ///
   /// first emit happens synchronously.
   Stream<int> onCountSync(Database database) =>
-      onKeys(database).map((e) => e.length);
+      onKeysSync(database).map((e) => e.length);
 }

sembast_test/lib/encrypt_codec.dart

@@ -7,7 +7,14 @@ import 'package:encrypt/encrypt.dart';
 // ignore: implementation_imports
 import 'package:sembast/src/api/v2/sembast.dart';
 
-var _random = Random.secure();
+final _random = () {
+  try {
+    // Try secure
+    return Random.secure();
+  } catch (_) {
+    return Random();
+  }
+}();
 
 /// Random bytes generator
 Uint8List _randBytes(int length) {

sembast_test/tool/node_test_run.dart

@@ -0,0 +1,11 @@
+import 'package:process_run/shell_run.dart';
+
+Future main() async {
+  var shell = Shell();
+
+  await shell.run('''
+
+  dart test --platform node --compiler dart2js
+
+''');
+}