deps: Update share_plus to 11.0.0, from 10.1.4

Changelog:
  https://pub.dev/packages/share_plus/changelog#1100

Just one change, a fairly large refactor:
  fluttercommunity/plus_plugins@0a19d4601

So, this commit also includes the switch to use the newer API.

Author: rajveermalviya

lib/widgets/action_sheet.dart

@@ -939,7 +939,8 @@ 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.share(rawContent);
+    final result =
+      await SharePlus.instance.share(ShareParams(text: rawContent));
 
     switch (result.status) {
       // The plugin isn't very helpful: "The status can not be determined".

pubspec.lock

@@ -906,18 +906,18 @@ packages:
     dependency: "direct main"
     description:
       name: share_plus
-      sha256: fce43200aa03ea87b91ce4c3ac79f0cecd52e2a7a56c7a4185023c271fbfa6da
+      sha256: b2961506569e28948d75ec346c28775bb111986bb69dc6a20754a457e3d97fa0
       url: "https://pub.dev"
     source: hosted
-    version: "10.1.4"
+    version: "11.0.0"
   share_plus_platform_interface:
     dependency: "direct main"
     description:
       name: share_plus_platform_interface
-      sha256: cc012a23fc2d479854e6c80150696c4a5f5bb62cb89af4de1c505cf78d0a5d0b
+      sha256: "1032d392bc5d2095a77447a805aa3f804d2ae6a4d5eef5e6ebb3bd94c1bc19ef"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.2"
+    version: "6.0.0"
   shelf:
     dependency: transitive
     description:

pubspec.yaml

@@ -55,8 +55,8 @@ dependencies:
   package_info_plus: ^8.0.0
   path: ^1.8.3
   path_provider: ^2.0.13
-  share_plus: ^10.1.3
-  share_plus_platform_interface: ^5.0.2
+  share_plus: ^11.0.0
+  share_plus_platform_interface: ^6.0.0
   sqlite3: ^2.4.0
   sqlite3_flutter_libs: ^0.5.13
   url_launcher: ^6.1.11