feat: add filterable annotation option for integer

src/mappings/definitions/fieldmap.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2019 StApps
+ * Copyright (C) 2019-2021 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -55,4 +55,5 @@ export const filterableMap: ElasticsearchFilterableMap = {
   date: ElasticsearchDataType.keyword,
   keyword: ElasticsearchDataType.keyword,
   text: ElasticsearchDataType.keyword,
+  integer: ElasticsearchDataType.integer,
 };