Add SingleNodeTransform to browser shim. Refs #27

Author: nwronski

lib/streaming-shim.js

@@ -4,3 +4,9 @@ export class SqliteParserTransform {
     throw new Error('SqliteParserTransform is not available in this environment');
   }
 }
+
+export class SingleNodeTransform {
+  constructor(options) {
+    throw new Error('SingleNodeTransform is not available in this environment');
+  }
+}