build(deps): update core dependency and version

- Update core dependency to version 1.4.0
- Bump package version from 1.5.0 to 1.6.0

Author: fulleni

pubspec.lock

@@ -89,11 +89,11 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: e66e076572bd326e50e9d5286ef5059ff658ed65
-      resolved-ref: e66e076572bd326e50e9d5286ef5059ff658ed65
+      ref: "v1.4.0"
+      resolved-ref: d26d4bfecf4c93cdcdda91dbc06c0a71f272b3f0
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
-    version: "1.3.1"
+    version: "1.4.0"
   crypto:
     dependency: transitive
     description:

pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_news_app_web_dashboard_full_source_code
 description: "A Flutter web application for comprehensive content management and administration within the Flutter News App Full Source Code Toolkit."
 repository: https://github.com/flutter-news-app-full-source-code/flutter-news-app-web-dashboard-full-source-code
 publish_to: none
-version: 1.3.0
+version: 1.6.0
 
 environment:
   sdk: ^3.9.0
@@ -94,7 +94,7 @@ dependency_overrides:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
-      ref: e66e076572bd326e50e9d5286ef5059ff658ed65
+      ref: v1.4.0
   http_client:
     git:
       url: https://github.com/flutter-news-app-full-source-code/http-client.git