Update pubspec.lock

This includes an upgrade of the package's dependencies

Author: vickz84259

pubspec.lock

@@ -94,7 +94,7 @@ packages:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.1.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -176,7 +176,7 @@ packages:
       name: webview_flutter_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   webview_flutter_wkwebview:
     dependency: transitive
     description:
@@ -185,5 +185,5 @@ packages:
     source: hosted
     version: "2.7.1"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=2.5.0"
+  dart: ">=2.15.0 <3.0.0"
+  flutter: ">=2.8.1"