build: update intl constraints

Author: deandreamatias

example/pubspec.lock

@@ -60,7 +60,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "10.0.0-dev.3"
+    version: "10.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
     sdk: flutter
   # This version would be max, the same version used on flutter_localizations
   # https://github.com/flutter/flutter/blob/17025dd88227cd9532c33fa78f5250d548d87e9a/packages/flutter_localizations/pubspec.yaml#L14
-  intl: ">=0.19.0 <0.20.0"
+  intl: ^0.19.0
 
 dev_dependencies:
   flutter_lints: ">=5.0.0 <6.0.0"