Prepare for dartdoc v0.18.0 (#1646)

* Revert "Pin bots to dev-40.0 (#1642)"

This reverts commit b9087d6235423cd85024ff739534f4e2c78bb045.

* Prepare for v0.18.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 140cf95..40f8add 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 0.18.0
+* Rename category_order flag to package_order. (#1634, #1636)
+* Use Google's CDN for jquery. (#1637)
+* Add the beginning of support for a dartdoc_options.yaml file. (#1638)
+* Code cleanups and refactoring related to packages (#1639, #1636)
+* Enable --preview-dart-2 in analyzer (#1630)
+* Add basic categorization for libraries (#1641)
+
 ## 0.17.1+1
 * Fix pub warning regarding unnecessary meta import.
 
diff --git a/lib/dartdoc.dart b/lib/dartdoc.dart
index bdacf91..9ce3985 100644
--- a/lib/dartdoc.dart
+++ b/lib/dartdoc.dart
@@ -36,7 +36,7 @@
 
 const String name = 'dartdoc';
 // Update when pubspec version changes.
-const String version = '0.17.1+1';
+const String version = '0.18.0';
 
 final String defaultOutDir = pathLib.join('doc', 'api');
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 8e29392..c5215dc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dartdoc
 # Also update the `version` field in lib/dartdoc.dart.
-version: 0.17.1+1
+version: 0.18.0
 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 d9b6ac4..c136a93 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 0.17.1+1">
+  <meta name="generator" content="made with love by dartdoc 0.18.0">
   <meta name="description" content="test_package API docs, for the Dart programming language.">
   <title>test_package - Dart API docs</title>