Prepare for dartdoc 0.19.0. (#1683)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2962eb..41dcc65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 0.19.0
+* Build documentation through the Package object (#1659)
+* New flag, --link-to-external, which will cause Dartdoc to link symbols to their originating
+  pub packages and/or the Flutter or Dart SDKs. (#739)
+* New configuration refactor and addition of several experimental options in dartdoc_options.yaml
+  (see README).
+* Update analyzer version to 0.31.2-alpha.2 (#1682).
+
 ## 0.18.1
 * Fix problems with the embedded SDK detection that cropped up in
   the package refactor (#1648, #1651)
diff --git a/lib/dartdoc.dart b/lib/dartdoc.dart
index e80abb6..fac8d60 100644
--- a/lib/dartdoc.dart
+++ b/lib/dartdoc.dart
@@ -37,7 +37,7 @@
 
 const String name = 'dartdoc';
 // Update when pubspec version changes.
-const String dartdocVersion = '0.18.1';
+const String dartdocVersion = '0.19.0';
 
 /// Generates Dart documentation for all public Dart libraries in the given
 /// directory.
diff --git a/pubspec.yaml b/pubspec.yaml
index b4a71c9..bd598e2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dartdoc
 # Also update the `version` field in lib/dartdoc.dart.
-version: 0.18.1
+version: 0.19.0
 author: Dart Team <misc@dartlang.org>
 description: A documentation generator for Dart.
 homepage: https://github.com/dart-lang/dartdoc
diff --git a/testing/test_package_docs/index.html b/testing/test_package_docs/index.html
index cb46bd6..7ffc362 100644
--- a/testing/test_package_docs/index.html
+++ b/testing/test_package_docs/index.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <meta name="generator" content="made with love by dartdoc 0.18.1">
+  <meta name="generator" content="made with love by dartdoc 0.19.0">
   <meta name="description" content="test_package API docs, for the Dart programming language.">
   <title>test_package - Dart API docs</title>