• Added flex properties that can hold any kind of data ("schema-less") supporting the following types on the Dart side:
  • Maps: JSON-like data structure with string keys and arbitrary values, including nested maps and lists.
  • Lists: can hold elements of any type, even mixed (like JSON arrays).
    On the Dart side, ObjectBox also offers binding to a list of maps, e.g. List<Map<String, dynamic>>.
  • Dynamic/Object: can hold any kind of data, including primitive types like integer, floating point and string,
    plus maps and lists.
  • Sync note: when used together with the MongoDB Connector,
    flex properties allow storing nested documents from MongoDB.
• Added dateUtc and dateUtcNano property types for DateTime read back UTC.
  #308
• Added "GeneratorVersion" enum to enforce generated code is compatible with the runtime library.
  You must run dart run build_runner build after updating the objectbox package.
  Until you regenerate code, compiling will fail with a message like this:
  "Error: Required named parameter 'generatorVersion' must be provided".