json 0.20.2

Easy encoding and decoding of JSON maps (maps of type `Map<String, Object?>`). Uses a macro that auto-generates a `fromJson` decoding constructor and a `toJson` encoding method.

0.20.2

• Fix generated code syntax error when defining fields containing the dollar sign $ by using raw strings.
• Remove vendored package workaround, require ^3.5.0-154 Dart SDK.

0.20.1

• Vendor macro packages as workaround for analyzer issue.

0.20.0

• Initial preview of JSON encoding and decoding with a JsonCodable macro.