Update dependencies and pubspec assets for example project (#402)

example/pubspec.yaml

@@ -3,7 +3,7 @@ description: A new Flutter project.
 
 # The following line prevents the package from being accidentally published to
 # pub.dev using `flutter pub publish`. This is preferred for private packages.
-publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+publish_to: "none" # Remove this line if you wish to publish to pub.dev
 
 # The following defines the version and build number for your application.
 # A version number is three numbers separated by dots, like 1.2.43
@@ -20,7 +20,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: ">=2.18.0 <3.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
@@ -40,7 +40,7 @@ dependencies:
     path: ../
   http: ^0.13.5
   image_picker: ^0.8.6
-  intl: ^0.17.0
+  intl: ^0.18.0
   mime: ^1.0.2
   open_filex: ^4.2.2
   path_provider: ^2.0.11
@@ -62,7 +62,6 @@ dev_dependencies:
 
 # The following section is specific to Flutter packages.
 flutter:
-
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
   # the material Icons class.

pubspec.yaml

@@ -7,8 +7,8 @@ homepage: https://flyer.chat
 repository: https://github.com/flyerhq/flutter_chat_ui
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
-  flutter: '>=2.0.0'
+  sdk: ">=2.18.0 <3.0.0"
+  flutter: ">=2.0.0"
 
 dependencies:
   diffutil_dart: ^3.0.0
@@ -18,7 +18,7 @@ dependencies:
   flutter_chat_types: ^3.6.0
   flutter_link_previewer: ^3.2.0
   flutter_parsed_text: ^2.2.1
-  intl: ^0.17.0
+  intl: ^0.18.0
   meta: ^1.8.0
   photo_view: ^0.14.0
   scroll_to_index: ^3.0.1