Update SDK and analyzer constraint (#3635)

CHANGELOG.md

@@ -2,8 +2,11 @@
 
 * Remove explicit library names. (#3609)
 * No longer write the dartdoc version into generated html files.
-* Add support for GitHub markdown alert syntax
-  (https://docs.github.com/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts).
+* Add support for [GitHub markdown alert syntax][].
+* Require Dart 3.2.0 or later.
+* Require `analyzer: ^6.4.0`.
+
+[GitHub markdown alert syntax]: https://docs.github.com/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts
 
 ## 8.0.3
 

pubspec.yaml

@@ -4,10 +4,10 @@ description: A non-interactive HTML documentation generator for Dart source code
 repository: https://github.com/dart-lang/dartdoc
 
 environment:
-  sdk: ^3.0.0
+  sdk: ^3.2.0
 
 dependencies:
-  analyzer: ^6.3.0
+  analyzer: ^6.4.0
   args: ^2.4.1
   collection: ^1.17.0
   crypto: ^3.0.3
@@ -24,9 +24,8 @@ dependencies:
 
 dev_dependencies:
   async: ^2.11.0
-  dart_style: ^2.3.1
-  http: ">=0.13.6 <2.0.0"
-  js: ">=0.6.7 <0.8.0"
+  dart_style: ^2.3.4
+  js: ^0.7.0
   lints: ^3.0.0
   matcher: ^0.12.15
   test: ^1.24.2