Compile error for List.empty()

[gokcer]

At Commit b0ae7ae lib/src/decoration/pin_decoration.dart line 29 creates compile error.

List.empty() create error at compiling for flutter 1.17.4 dart 2.8.4.

[VikasPawar2112]

At Commit b0ae7ae lib/src/decoration/pin_decoration.dart line 29 creates compile error.

List.empty() create error at compiling for flutter 1.17.4 dart 2.8.4.

I am also getting this issue when build app.
Error log: pin_input_text_field-3.1.0/lib/src/decoration/pin_decoration.dart:29:44: Error: Method not found: 'List.empty'.
List get getGapWidthList => List.empty();

Details:
sms_autofill: ^1.2.5
Flutter 1.17.5
Dart 2.8.4

[TinoGuo]

@gokcer @VikasPawar2112 i think it should be fixed it since 3.1.1 as no environment to verify.