Add usedDatabaseSize to stats type

Author: consoleLogIt

src/types.ts

@@ -789,6 +789,7 @@ export type IndexStats = {
 
 export type Stats = {
   databaseSize: number;
+  usedDatabaseSize: number;
   lastUpdate: string;
   indexes: {
     [index: string]: IndexStats;

tests/client.test.ts

@@ -547,6 +547,7 @@ describe.each([{ permission: "Master" }, { permission: "Admin" }])(
         const client = await getClient(permission);
         const response: Stats = await client.getStats();
         expect(response).toHaveProperty("databaseSize", expect.any(Number));
+        expect(response).toHaveProperty("usedDatabaseSize", expect.any(Number));
         expect(response).toHaveProperty("lastUpdate"); // TODO: Could be null, find out why
         expect(response).toHaveProperty("indexes", expect.any(Object));
       });