fixed nextval and update tests

test/backends/QueryStatementTests.cpp

@@ -110,10 +110,7 @@ TEST_CASE_METHOD(QueryFixture, "Test update statement", "[query][statement][upda
   george.age = 36;
   george.image = {5,6,7,8};
   stmt = query::update(PERSON)
-    .set(PERSON.id, _)
-    .set(PERSON.name, _)
-    .set(PERSON.age, _)
-    .set(PERSON.image, _)
+    .set<person>()
     .where(PERSON.id == _)
     .prepare(db);
   REQUIRE(stmt);