transform API cannot traversal JSDoc node

**Is your feature request related to a problem? Please describe.**

I want to modify huge jsdoc in a simple script , but transform cannot traversal JSDoc node

**Describe the solution you'd like**

```
sourceFile.transform(traversal => {
const node = traversal.visitChildren(); // maybe need a options

if (ts.isJSDoc(node)) {
return ts.createJsDoc(); // no createJSDoc method right now
}

return node;
});

```

**Describe alternatives you've considered**