misc: support the Dart 2 stable release (dart-lang/pubspec_parse#18)

pkgs/pubspec_parse/CHANGELOG.md

diff --git a/pkgs/pubspec_parse/CHANGELOG.md b/pkgs/pubspec_parse/CHANGELOG.md
index 30551e7..2447adb 100644
--- a/pkgs/pubspec_parse/CHANGELOG.md
+++ b/pkgs/pubspec_parse/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.2+1
+
+- Support the Dart 2 stable release.
+
 ## 0.1.2
 
 - Allow superfluous `version` keys with `git` and `path` dependencies.

pkgs/pubspec_parse/pubspec.yaml

diff --git a/pkgs/pubspec_parse/pubspec.yaml b/pkgs/pubspec_parse/pubspec.yaml
index 2ec796f..eaedffb 100644
--- a/pkgs/pubspec_parse/pubspec.yaml
+++ b/pkgs/pubspec_parse/pubspec.yaml
@@ -2,12 +2,12 @@
 description: >-
   Simple package for parsing pubspec.yaml files with a type-safe API and rich
   error reporting.
-version: 0.1.3-dev
+version: 0.1.2+1
 homepage: https://github.com/dart-lang/pubspec_parse
 author: Dart Team <misc@dartlang.org>
 
 environment:
-  sdk: '>=2.0.0-dev.54 <2.0.0'
+  sdk: '>=2.0.0-dev.54 <3.0.0'
 
 dependencies:
   json_annotation: ^0.2.9