fix(streams): tighten stream typings and guard optional runtime paths for duplex and wrapper utilities

ts_web/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartstream',
-  version: '3.4.1',
+  version: '3.4.2',
   description: 'A library to simplify the creation and manipulation of Node.js streams, providing utilities for handling transform, duplex, and readable/writable streams effectively in TypeScript.'
 }

ts_web/classes.webduplexstream.ts

@@ -112,7 +112,10 @@ export class WebDuplexStream<TInput = any, TOutput = any> extends TransformStrea
     };
 
     try {
-      await this.options.readFunction(tools);
+      const readFunction = this.options.readFunction;
+      if (readFunction) {
+        await readFunction(tools);
+      }
       if (doneSignaled) {
         await writer.close();
       }