Support the latest release of pkg:json_annotation (dart-lang/pubspec_parse#28)

pkgs/pubspec_parse/CHANGELOG.md

diff --git a/pkgs/pubspec_parse/CHANGELOG.md b/pkgs/pubspec_parse/CHANGELOG.md
index d114b8c..26de02e 100644
--- a/pkgs/pubspec_parse/CHANGELOG.md
+++ b/pkgs/pubspec_parse/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.2+3
+
+- Support the latest version of `package:json_annotation`.
+
 ## 0.1.2+2
 
 - Support `package:json_annotation` v1.

pkgs/pubspec_parse/pubspec.yaml

diff --git a/pkgs/pubspec_parse/pubspec.yaml b/pkgs/pubspec_parse/pubspec.yaml
index 5dcb3dc..871ae6e 100644
--- a/pkgs/pubspec_parse/pubspec.yaml
+++ b/pkgs/pubspec_parse/pubspec.yaml
@@ -2,16 +2,16 @@
 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+3
 homepage: https://github.com/dart-lang/pubspec_parse
 author: Dart Team <misc@dartlang.org>
 
 environment:
-  sdk: '>=2.0.0-dev.54 <3.0.0'
+  sdk: '>=2.0.0 <3.0.0'
 
 dependencies:
-  # Verified that no new features since 0.2.9 are used - be careful!
-  json_annotation: '>=0.2.9 <2.0.0'
+  # Verified that no new features since 1.0.0 are used - be careful!
+  json_annotation: '>=1.0.0 <3.0.0'
   pub_semver: ^1.3.2
   yaml: ^2.1.12