chore: prepare for v1.3.0

lib/main.dart

@@ -158,7 +158,7 @@ class HomePage extends StatelessWidget {
                               : Container(),
                         ],
                       ),
-                      const Text("v1.2.1")
+                      const Text("v1.3.0")
                     ],
                   ),
                 )

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.2.1+2
+version: 1.3.0+3
 
 environment:
   sdk: ">=3.4.3 <4.0.0"