Build Failed with oat++ v1.3.0 

Similar switch away from StrBuffer to its std::string representation leads to compile errors like
```
oatpp-sqlite/src/oatpp-sqlite/mapping/type/Blob.hpp:40:57: error: ‘StrBuffer’ is not a member of ‘oatpp::base’
   40 | typedef oatpp::data::mapping::type::ObjectWrapper<base::StrBuffer, __class::Blob> Blob;
```

This needs to be adjusted to match the API. 