fix: check TypeComposer via class name

Author: nodkz

src/composeWithPagination.js

@@ -13,7 +13,7 @@ export function composeWithPagination(
   typeComposer: TypeComposer,
   opts: ComposeWithPaginationOpts
 ): TypeComposer {
-  if (!(typeComposer instanceof TypeComposer)) {
+  if (!typeComposer || typeComposer.constructor.name !== 'TypeComposer') {
     throw new Error('You should provide TypeComposer instance to composeWithPagination method');
   }
 

src/paginationResolver.js

@@ -43,7 +43,7 @@ export function preparePaginationResolver<TSource, TContext>(
   typeComposer: TypeComposer,
   opts: ComposeWithPaginationOpts
 ): Resolver<TSource, TContext> {
-  if (!(typeComposer instanceof TypeComposer)) {
+  if (!typeComposer || typeComposer.constructor.name !== 'TypeComposer') {
     throw new Error('First arg for prepareConnectionResolver() should be instance of TypeComposer');
   }