[image_picker]version fix to 0.5.4+2 (#1533)

packages/image_picker/pubspec.yaml

diff --git a/packages/image_picker/pubspec.yaml b/packages/image_picker/pubspec.yaml
index 659e492..f9d8c73 100755
--- a/packages/image_picker/pubspec.yaml
+++ b/packages/image_picker/pubspec.yaml
@@ -5,7 +5,7 @@
   - Flutter Team <flutter-dev@googlegroups.com>
   - Rhodes Davis Jr. <rody.davis.jr@gmail.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker
-version: 0.5.4+1
+version: 0.5.4+2
 
 flutter:
   plugin: