Like #27964 but for JSX (#28068)

Author: weswigham

src/compiler/visitor.ts

@@ -1378,6 +1378,7 @@ namespace ts {
             case SyntaxKind.JsxSelfClosingElement:
             case SyntaxKind.JsxOpeningElement:
                 result = reduceNode((<JsxSelfClosingElement | JsxOpeningElement>node).tagName, cbNode, result);
+                result = reduceNodes((<JsxSelfClosingElement | JsxOpeningElement>node).typeArguments, cbNode, result);
                 result = reduceNode((<JsxSelfClosingElement | JsxOpeningElement>node).attributes, cbNode, result);
                 break;