Bump to 8.3.0 (dart-lang#3909)

Author: srawlins

CHANGELOG.md

@@ -1,3 +1,11 @@
+## 8.3.0
+
+* The URL for library pages has moved "<em>library-name</em>-library.html" to
+  "index.html" in the same directory. A redirecting file is left in the
+  previous location. (#3895)
+* Display extension members on the extended type's page, when the extended type
+  is nullable. (#3908)
+
 ## 8.2.1
 
 * When calculating the "directory name" of an anonymous library, strip the

dartdoc_options.yaml

@@ -1,4 +1,4 @@
 dartdoc:
   linkToSource:
     root: '.'
-    uriTemplate: 'https://github.com/dart-lang/dartdoc/blob/v8.2.1/%f%#L%l%'
+    uriTemplate: 'https://github.com/dart-lang/dartdoc/blob/v8.3.0/%f%#L%l%'

lib/src/version.dart

@@ -1 +1 @@
-const packageVersion = '8.2.1';
+const packageVersion = '8.3.0';

pubspec.yaml

@@ -1,5 +1,5 @@
 name: dartdoc
-version: 8.2.1
+version: 8.3.0
 description: A non-interactive HTML documentation generator for Dart source code.
 repository: https://github.com/dart-lang/dartdoc