feat(nodejs): expose offset (#1620)

PR closes #1555

nodejs/__test__/table.test.ts

@@ -396,6 +396,10 @@ describe("When creating an index", () => {
       .toArrow();
     expect(rst2.numRows).toBe(2);
     expect(rst.toString()).toEqual(rst2.toString());
+
+    // test offset
+    rst = await tbl.query().limit(2).offset(1).nearestTo(queryVec).toArrow();
+    expect(rst.numRows).toBe(1);
   });
 
   it("should allow parameters to be specified", async () => {