build(deps): update core dependency to v1.3.1

- Update core dependency version from v1.3.0 to v1.3.1
- Update resolved-ref in pubspec.lock file
- Modify dependency version in pubspec.yaml and dependency_overrides

Author: fulleni

pubspec.lock

@@ -177,11 +177,11 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: "v1.3.0"
-      resolved-ref: ee2ad7de28baec04d64c0afd3e3a61d7e4ad6cb0
+      ref: "v1.3.1"
+      resolved-ref: a03efff11b7577974cb444a1a6a46fee8b05ea42
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
-    version: "1.3.0"
+    version: "1.3.1"
   coverage:
     dependency: transitive
     description:

pubspec.yaml

@@ -46,7 +46,7 @@ dependencies:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
-      ref: v1.3.0
+      ref: v1.3.1
   data_api:
     git:
       url: https://github.com/flutter-news-app-full-source-code/data-api.git
@@ -141,4 +141,4 @@ dependency_overrides:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
-      ref: v1.3.0
+      ref: v1.3.1