deps: Upgrade packages to latest, namely package_info_plus, share_plus

This is the result of `tools/upgrade pod-major`, and some small
adjustments for a breaking API change in share_plus.

Changelogs:
  https://pub.dev/packages/package_info_plus/changelog
  https://pub.dev/packages/share_plus/changelog

Tested on my iPhone and on the office Android device. In particular,
I checked that sharing message content via the message action sheet
still worked, and I checked that the "About Zulip" page still shows
the "App version" field correctly.

lib/widgets/action_sheet.dart

@@ -205,7 +205,7 @@ class ShareButton extends MessageActionSheetMenuItemButton {
     //     https://pub.dev/packages/share_plus#ipad
     //   Perhaps a wart in the API; discussion:
     //     https://github.com/zulip/zulip-flutter/pull/12#discussion_r1130146231
-    final result = await Share.shareWithResult(rawContent);
+    final result = await Share.share(rawContent);
 
     switch (result.status) {
       // The plugin isn't very helpful: "The status can not be determined".

pubspec.lock

@@ -752,18 +752,18 @@ packages:
     dependency: "direct main"
     description:
       name: package_info_plus
-      sha256: cb44f49b6e690fa766f023d5b22cac6b9affe741dd792b6ac7ad4fabe0d7b097
+      sha256: b93d8b4d624b4ea19b0a5a208b2d6eff06004bc3ce74c06040b120eeadd00ce0
       url: "https://pub.dev"
     source: hosted
-    version: "6.0.0"
+    version: "8.0.0"
   package_info_plus_platform_interface:
     dependency: transitive
     description:
       name: package_info_plus_platform_interface
-      sha256: "9bc8ba46813a4cc42c66ab781470711781940780fd8beddd0c3da62506d3a6c6"
+      sha256: f49918f3433a3146047372f9d4f1f847511f2acd5cd030e1f44fe5a50036b70e
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   path:
     dependency: "direct main"
     description:
@@ -904,18 +904,18 @@ packages:
     dependency: "direct main"
     description:
       name: share_plus
-      sha256: fb5319f3aab4c5dda5ebb92dca978179ba21f8c783ee4380910ef4c1c6824f51
+      sha256: ef3489a969683c4f3d0239010cc8b7a2a46543a8d139e111c06c558875083544
       url: "https://pub.dev"
     source: hosted
-    version: "8.0.3"
+    version: "9.0.0"
   share_plus_platform_interface:
     dependency: "direct main"
     description:
       name: share_plus_platform_interface
-      sha256: "251eb156a8b5fa9ce033747d73535bf53911071f8d3b6f4f0b578505ce0d4496"
+      sha256: "0f9e4418835d1b2c3ae78fdb918251959106cefdbc4dd43526e182f80e82f6d4"
       url: "https://pub.dev"
     source: hosted
-    version: "3.4.0"
+    version: "4.0.0"
   shelf:
     dependency: transitive
     description:

pubspec.yaml

@@ -56,11 +56,11 @@ dependencies:
   image_picker: ^1.0.0
   intl: ^0.19.0
   json_annotation: ^4.8.1
-  package_info_plus: ^6.0.0
+  package_info_plus: ^8.0.0
   path: ^1.8.3
   path_provider: ^2.0.13
-  share_plus: ^8.0.2
-  share_plus_platform_interface: ^3.3.1
+  share_plus: ^9.0.0
+  share_plus_platform_interface: ^4.0.0
   sqlite3: ^2.4.0
   sqlite3_flutter_libs: ^0.5.13
   url_launcher: ^6.1.11

test/test_share_plus.dart

@@ -12,7 +12,7 @@ class MockSharePlus {
 
   Future<Object?> handleMethodCall(MethodCall methodCall) async {
     switch (methodCall.method) {
-      case 'shareWithResult':
+      case 'share':
         // The method channel doesn't preserve Map<String, dynamic> as
         // `arguments`'s type; logging runtimeType gives _Map<Object?, Object?>.
         final arguments = methodCall.arguments as Map;