Merge pull request #58 from davidmorgan/fix-version-constraint

Fix version constraint to not require a dev version.
diff --git a/pubspec.yaml b/pubspec.yaml
index b3d8e8f..5957c9f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@
 homepage: https://github.com/dart-lang/pedantic
 
 environment:
-  sdk: '>=2.1.1-dev.0.0 <3.0.0'
+  sdk: '>=2.1.1 <3.0.0'
 
 dependencies:
   meta: ^1.2.0