[BUG]: gen fails when there is only list in a JSON

[tomas-dorda]

Is there an existing issue for this?

• I have searched the existing issues

Version

5.0.2

Command type

build_runner (Default)

What happened?

The JSON is not necessary Map<String, dynamic> it crashes when there is JSON like:
[ { "id": "ABC42" } ]

Relevant a pubspec.yaml.

flutter_gen:
  output: lib/gen/
  line_length: 80
  integrations:
    flutter_svg: false
    flare_flutter: false
    rive: false
    lottie: true

Relevant log output

[SEVERE] flutter_gen_runner on $package$:

type 'List<dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast

Code of Conduct

• I agree to follow this project's Code of Conduct

[wasabeef]

@tomas-dorda
I just released v5.0.3.