chore(repo): Relax intl constraint (#2675)

Fixes #2642

Our current constraint, ^0.17.0, means >=0.17.0 <0.18.0 but we should accept whichever version the customer uses (which is most often the one pinned by flutter).

Author: dnys1

packages/amplify_authenticator/pubspec.yaml

@@ -20,7 +20,7 @@ dependencies:
     sdk: flutter
   flutter_localizations:
     sdk: flutter
-  intl: ^0.17.0
+  intl: '>=0.17.0 <1.0.0'
   stream_transform: ^2.0.0
 
 dev_dependencies:

packages/amplify_core/pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
   collection: ^1.15.0
   flutter:
     sdk: flutter
-  intl: ^0.17.0
+  intl: '>=0.17.0 <1.0.0'
   json_annotation: ^4.3.0
   meta: ^1.7.0
   plugin_platform_interface: ^2.0.0