fetchMore typing was too loose

Fixes #2346

Author: PowerKiKi

.changeset/fifty-lizards-applaud.md

@@ -0,0 +1,5 @@
+---
+'apollo-angular': patch
+---
+
+`fetchMore` typing was too loose

packages/apollo-angular/src/query-ref.ts

@@ -97,8 +97,8 @@ export class QueryRef<TData, TVariables extends OperationVariables = EmptyObject
   }
 
   public fetchMore<TFetchVars extends OperationVariables = TVariables>(
-    fetchMoreOptions: Parameters<QueryRef<TData, TFetchVars>['obsQuery']['fetchMore']>[0],
-  ): ReturnType<QueryRef<TData, TFetchVars>['obsQuery']['fetchMore']> {
+    fetchMoreOptions: Parameters<ObservableQuery<TData, TFetchVars>['fetchMore']>[0],
+  ): ReturnType<ObservableQuery<TData, TFetchVars>['fetchMore']> {
     return this.obsQuery.fetchMore(fetchMoreOptions);
   }