Add dependency on the meta package (#298)

* Add dependency on the meta package

* fix travis; restict to dev SDK
diff --git a/.travis.yml b/.travis.yml
index dbb7c4a..4fc40e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,9 @@
 language: dart
 
 dart:
-  - 2.6.0
+  # Because of build_runner difficulties with the null safety experiment, only
+  # run on dev channel for a while.
+  # - 2.6.0
   - dev
 
 dart_task:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c447cd..353daf7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.1.7
+
+* Add dependency on the meta package
+
 ## 2.1.6
 
 * Fix for custom link resolvers
diff --git a/lib/src/version.dart b/lib/src/version.dart
index 88c2f9f..f39844c 100644
--- a/lib/src/version.dart
+++ b/lib/src/version.dart
@@ -1,2 +1,2 @@
 // Generated code. Do not modify.
-const packageVersion = '2.1.6';
+const packageVersion = '2.1.7';
diff --git a/pubspec.yaml b/pubspec.yaml
index e272a32..9151883 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 2.1.6
+version: 2.1.7
 
 description: A library for converting markdown to HTML.
 homepage: https://github.com/dart-lang/markdown
@@ -13,6 +13,7 @@
 dependencies:
   args: ^1.0.0
   charcode: ^1.1.0
+  meta: ^1.0.0
 
 dev_dependencies:
   build_runner: ^1.0.0