Fix about page issues (#512)

* fix-bugs

* Update about.dart
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 8f5cb03..3ef861d 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -45,4 +45,10 @@
         </activity>
         <meta-data android:name="io.flutter.embedding.engine.deferredcomponents.DeferredComponentManager.loadingUnitMapping" android:value="77:crane,2:,3:,4:,5:,6:,7:,8:,9:,10:,11:,12:,13:,14:,15:,16:,17:,18:,19:,20:,21:,22:,23:,24:,25:,26:,27:,28:,29:,30:,31:,32:,33:,34:,35:,36:,37:,38:,39:,40:,41:,42:,43:,44:,45:,46:,47:,48:,49:,50:,51:,52:,53:,54:,55:,56:,57:,58:,59:,60:,61:,62:,63:,64:,65:,66:,67:,68:,69:,70:,71:,72:,73:,74:,75:,76:,78:,79:,80:,81:,82:,83:,84:,85:,86:"/>
     </application>
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="https" />
+        </intent>
+    </queries>
 </manifest>
diff --git a/ios/Podfile.lock b/ios/Podfile.lock
index f287baa..6616410 100644
--- a/ios/Podfile.lock
+++ b/ios/Podfile.lock
@@ -1,6 +1,6 @@
 PODS:
   - Flutter (1.0.0)
-  - package_info (0.0.1):
+  - package_info_plus (0.4.5):
     - Flutter
   - path_provider (0.0.1):
     - Flutter
@@ -9,15 +9,15 @@
 
 DEPENDENCIES:
   - Flutter (from `Flutter`)
-  - package_info (from `.symlinks/plugins/package_info/ios`)
+  - package_info_plus (from `.symlinks/plugins/package_info_plus/ios`)
   - path_provider (from `.symlinks/plugins/path_provider/ios`)
   - url_launcher (from `.symlinks/plugins/url_launcher/ios`)
 
 EXTERNAL SOURCES:
   Flutter:
     :path: Flutter
-  package_info:
-    :path: ".symlinks/plugins/package_info/ios"
+  package_info_plus:
+    :path: ".symlinks/plugins/package_info_plus/ios"
   path_provider:
     :path: ".symlinks/plugins/path_provider/ios"
   url_launcher:
@@ -25,7 +25,7 @@
 
 SPEC CHECKSUMS:
   Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
-  package_info: 873975fc26034f0b863a300ad47e7f1ac6c7ec62
+  package_info_plus: 6c92f08e1f853dc01228d6f553146438dafcd14e
   path_provider: abfe2b5c733d04e238b0d8691db0cfd63a27a93c
   url_launcher: 6fef411d543ceb26efce54b05a0a40bfd74cbbef
 
diff --git a/lib/pages/about.dart b/lib/pages/about.dart
index 53a700c..f5a411d 100644
--- a/lib/pages/about.dart
+++ b/lib/pages/about.dart
@@ -107,7 +107,7 @@
                   textTheme: Typography.material2018(
                     platform: Theme.of(context).platform,
                   ).black,
-                  scaffoldBackgroundColor: Colors.white,
+                  cardColor: Colors.white,
                 ),
                 child: const LicensePage(
                   applicationName: name,
diff --git a/pubspec.lock b/pubspec.lock
index 4cec924..68fd085 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -119,7 +119,7 @@
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "1.0.3"
   fake_async:
     dependency: transitive
     description:
@@ -133,7 +133,7 @@
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.0"
   file:
     dependency: transitive
     description:
@@ -212,7 +212,7 @@
       name: google_fonts
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   grinder:
     dependency: "direct dev"
     description:
@@ -226,7 +226,7 @@
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.1"
+    version: "0.13.3"
   http_multi_server:
     dependency: transitive
     description:
@@ -373,7 +373,7 @@
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   path_provider_linux:
     dependency: transitive
     description:
@@ -471,7 +471,7 @@
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.1"
+    version: "1.1.4"
   shelf_packages_handler:
     dependency: transitive
     description:
@@ -595,7 +595,7 @@
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.3"
+    version: "6.0.4"
   url_launcher_linux:
     dependency: transitive
     description:
@@ -616,7 +616,7 @@
       name: url_launcher_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.0.3"
   url_launcher_web:
     dependency: transitive
     description:
@@ -665,7 +665,7 @@
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   webdriver:
     dependency: transitive
     description:
@@ -686,7 +686,7 @@
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.1.1"
   xdg_directories:
     dependency: transitive
     description:
@@ -702,5 +702,5 @@
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.13.0 <3.0.0"
   flutter: ">=2.2.0"