Update pubspec to match templates (#19)

diff --git a/packages/flutter_image/pubspec.yaml b/packages/flutter_image/pubspec.yaml
index 59d3cad..f930dee 100644
--- a/packages/flutter_image/pubspec.yaml
+++ b/packages/flutter_image/pubspec.yaml
@@ -10,11 +10,11 @@
     sdk: flutter
 
 dev_dependencies:
-  quiver: '>=0.24.0 <3.0.0'
-  test: any
   flutter_test:
     sdk: flutter
+  quiver: '>=0.24.0 <3.0.0'
+  test: any
 
 environment:
   sdk: ">=2.0.0-dev.28.0 <3.0.0"
-  flutter: ">=1.10.15-pre.144 <2.0.0"
+  flutter: ">=1.10.15-pre.144"