Fix the pubspecs SDK constraints (#146)

Author: rxlabz

CHANGELOG.md

@@ -44,6 +44,7 @@
 - chore: new analysis options rules
 - Ref: rename the `throwable` argument name to `exception` in `captureEvents(...)`
 - Ref : remove dsn from Transport public Api
+- update the Dart sdk constraint
 
 # `package:sentry` changelog
 

dart/pubspec.yaml

@@ -6,7 +6,7 @@ description: >
 homepage: https://github.com/getsentry/sentry-dart
 
 environment:
-  sdk: ^2.0.0
+  sdk: ">=2.0.0 <3.0.0"
 
 dependencies:
   http: ^0.12.0

flutter/pubspec.yaml

@@ -5,15 +5,15 @@ homepage: https://docs.sentry.io/platforms/flutter/
 repository: https://github.com/getsentry/sentry-dart
 
 environment:
-  sdk: ^2.7.0
+  sdk: ">=2.0.0 <3.0.0"
   flutter: ^1.17.0
 
 dependencies:
   flutter:
     sdk: flutter
   flutter_web_plugins:
     sdk: flutter
-  sentry:
+  sentry: #^4.0.0 uncomment before publishing
     path: ../dart
 
 dev_dependencies: