Update version to 0.4.0.

CHANGELOG.md

 # CHANGELOG
 
+## 0.4.0
+
+roolback `photo_manager` to `0.4.0`
+
+- support androidQ.
+
 ## 0.3.4+1
 
 fix:

pubspec.lock

   photo_manager:
     dependency: "direct main"
     description:
-      path: "."
-      ref: ffaa6e8470708e63c3456837c8bd6eef7b0d42df
-      resolved-ref: ffaa6e8470708e63c3456837c8bd6eef7b0d42df
-      url: "https://github.com/CaiJingLong/flutter_photo_manager.git"
-    source: git
+      name: photo_manager
+      url: "https://pub.flutter-io.cn"
+    source: hosted
     version: "0.4.0"
   quiver:
     dependency: transitive

pubspec.yaml

 name: photo
 description: image picker, multi picker support video/icloud asset, use flutter as ui, if you want to build custom ui, you just use photo_manager.
-version: 0.3.4+1
+version: 0.4.0
 author: caijinglong<cjl_spy@163.com>
 homepage: https://github.com/CaiJingLong/flutter_photo
 
   flutter:
     sdk: flutter
 
-  # photo_manager: ^0.3.4
-  photo_manager:
-    git:
-      url: https://github.com/CaiJingLong/flutter_photo_manager.git
-      ref: ffaa6e8470708e63c3456837c8bd6eef7b0d42df
+  photo_manager: ^0.4.0
+  # photo_manager:
+  #   git:
+  #     url: https://github.com/CaiJingLong/flutter_photo_manager.git
+  #     ref: ffaa6e8470708e63c3456837c8bd6eef7b0d42df
   # photo_manager:
   #   path: ../flutter_photo_manager