feat(core): Allow passing preserveFragment

fixes #39

Author: Airblader

projects/ngqp/core/src/lib/router-adapter/router-adapter.interface.ts

@@ -30,13 +30,15 @@ export interface RouterAdapter {
  */
 export interface RouterOptions {
     replaceUrl?: boolean;
+    preserveFragment?: boolean;
 }
 
 /**
  * See {@link RouterOptions}.
  */
 export const DefaultRouterOptions: RouterOptions = {
     replaceUrl: true,
+    preserveFragment: true,
 };
 
 /** @internal */