⬆️ Support package:archive v4 (#635)

## What does this change?

Fixes #625 🎯

## Type of change

- [x] New feature (non-breaking change which adds functionality)

Author: AlexV525

packages/core/lib/generators/integrations/lottie_integration.dart

@@ -124,7 +124,14 @@ ${isPackage ? "\n  static const String package = '$packageName';" : ''}
     }
     if (asset.mime == 'application/zip') {
       final inputStream = InputFileStream(asset.fullPath);
-      final archive = ZipDecoder().decodeBuffer(inputStream);
+      final decoder = ZipDecoder();
+      Archive archive;
+      try {
+        // Compatible with archive v4.
+        archive = (decoder as dynamic).decodeStream(inputStream);
+      } on NoSuchMethodError {
+        archive = (decoder as dynamic).decodeBuffer(inputStream);
+      }
       final jsonFile = archive.files.firstWhereOrNull(
         (e) => e.name.endsWith('.json'),
       );

packages/core/pubspec.yaml

@@ -25,7 +25,7 @@ dependencies:
   glob: ^2.0.0
 
   dart_style: '>=2.2.4 <4.0.0'
-  archive: ^3.4.0
+  archive: '>=3.4.0 <5.0.0'
   args: ^2.0.0
   pub_semver: ^2.0.0
   vector_graphics_compiler: ^1.1.9