Remove -dev.infinity in SDK upper constraint

pkgs/yaml/pubspec.yaml

diff --git a/pkgs/yaml/pubspec.yaml b/pkgs/yaml/pubspec.yaml
index 8dd0034..2d29bda 100644
--- a/pkgs/yaml/pubspec.yaml
+++ b/pkgs/yaml/pubspec.yaml
@@ -4,7 +4,7 @@
 homepage: https://github.com/dart-lang/yaml
 description: A parser for YAML.
 environment:
-  sdk: '>=1.23.0 <2.0.0-dev.infinity'
+  sdk: '>=1.23.0 <2.0.0'
 dependencies:
   charcode: "^1.1.0"
   collection: ">=1.1.0 <2.0.0"