Update dependency dart to v3

renovate[bot] · web-flow · commit e81825a16e62 · 2023-08-23T05:24:32.000Z
diff --git a/core/pubspec.yaml b/core/pubspec.yaml
@@ -3,7 +3,7 @@ description: dartstruct is an annotation processor generator using source_gen an
 version: 0.0.0
 
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: '<4.0.0'
 
 dependencies:
   path: ^1.6.0
diff --git a/generator/pubspec.yaml b/generator/pubspec.yaml
@@ -3,7 +3,7 @@ description: dartstruct generator is an annotation processor generator using sou
 version: 0.0.0
 
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: '<4.0.0'
 
 dependencies:
   build: ^1.2.2
diff --git a/integration_tests/pubspec.yaml b/integration_tests/pubspec.yaml
@@ -3,7 +3,7 @@ description:
 version: 0.0.0
 
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: '<4.0.0'
 
 dependencies:
   dartstruct:
