fix(core): update

ts/index.ts

@@ -7,3 +7,11 @@ declare global {
 
 // normal
 export * from './smartpdf.classes.smartpdf.js';
+
+// additional types
+import type * as tsclassTypes from '@tsclass/tsclass';
+type IPdf = tsclassTypes.business.IPdf;
+
+export type {
+  IPdf
+}