change the mime type for dart source (#19)

change the mime type for dart source
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e14685..88fd3ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,16 +1,20 @@
+# 0.9.6+3
+
+* Change the mime type for Dart source from `application/dart` to `text/x-dart`.
+
 # 0.9.6+2
 
-- Set max SDK version to `<3.0.0`, and adjust other dependencies.
+* Set max SDK version to `<3.0.0`, and adjust other dependencies.
 
 # 0.9.6+1
 
-- Stop using deprecated constants from the SDK.
+* Stop using deprecated constants from the SDK.
 
 # 0.9.6
 
 * Updates to support Dart 2.0 core library changes (wave
   2.2). See [issue 31847][sdk#31847] for details.
-  
+
   [sdk#31847]: https://github.com/dart-lang/sdk/issues/31847
 
 # 0.9.5
diff --git a/lib/src/default_extension_map.dart b/lib/src/default_extension_map.dart
index 2b27bef..c7add48 100644
--- a/lib/src/default_extension_map.dart
+++ b/lib/src/default_extension_map.dart
@@ -150,7 +150,7 @@
   'cxx': 'text/x-c',
   'dae': 'model/vnd.collada+xml',
   'daf': 'application/vnd.mobius.daf',
-  'dart': 'application/dart',
+  'dart': 'text/x-dart',
   'dataless': 'application/vnd.fdsn.seed',
   'davmount': 'application/davmount+xml',
   'dbk': 'application/docbook+xml',
diff --git a/pubspec.yaml b/pubspec.yaml
index 97e27ef..eae8987 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mime
-version: 0.9.6+2
+version: 0.9.6+3
 
 description: Helper-package for working with MIME.
 author: Dart Team <misc@dartlang.org>
diff --git a/test/mime_type_test.dart b/test/mime_type_test.dart
index 39365be..84a7eca 100644
--- a/test/mime_type_test.dart
+++ b/test/mime_type_test.dart
@@ -23,9 +23,9 @@
 void main() {
   group('global-lookup', () {
     test('by-path', () {
-      _expectMimeType('file.dart', 'application/dart');
+      _expectMimeType('file.dart', 'text/x-dart');
       // Test mixed-case
-      _expectMimeType('file.DaRT', 'application/dart');
+      _expectMimeType('file.DaRT', 'text/x-dart');
       _expectMimeType('file.html', 'text/html');
       _expectMimeType('file.xhtml', 'application/xhtml+xml');
       _expectMimeType('file.jpeg', 'image/jpeg');