Here are some bugs:
- `ADD m.a.c :inc` update expression wrote a literal top-level m.a.c attribute but didn't change the nested number.
- TransactGetItems returned fields not requested.
- update expression can update the same key multiple times.
In total my conformance suite found 583 failures out of 1279 tests.
In total my conformance suite found 583 failures out of 1279 tests.