Update dependency dart to v3

Author: renovate[bot]

example/pubspec.lock

@@ -142,10 +142,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.0"
   nested:
     dependency: transitive
     description:
@@ -219,10 +219,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "522f00f556e73044315fa4585ec3270f1808a4b186c936e612cab0b565ff1e00"
+      sha256: ab2726c1a94d3176a45960b6234466ec367179b87dd74f1611adb1f3b5fb9d55
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.6"
+    version: "0.7.7"
   vector_math:
     dependency: transitive
     description:
@@ -240,5 +240,5 @@ packages:
     source: hosted
     version: "15.0.2"
 sdks:
-  dart: ">=3.8.0 <4.0.0"
+  dart: "3.10.8"
   flutter: ">=3.18.0-18.0.pre.54"

example/pubspec.yaml

@@ -6,7 +6,7 @@ description: Demonstrates how to use the disks plugin.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 
 environment:
-  sdk: ">=2.17.6 <3.0.0"
+  sdk: "3.10.8"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions