pin test to 1.31.0 to match the Flutter SDK's test_api

The SDK's flutter_test pins test_api 0.7.11, but test 1.30.0 requires
0.7.10, so dependency resolution failed and make run/test aborted.
1.31.0 is the release whose test_api dep is exactly 0.7.11; 1.31.1 wants
0.7.12 and would re-conflict. Pulls in the transitive meta 1.18.0 and a
Dart >=3.10 lower bound.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pubspec.lock

@@ -326,10 +326,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.0"
+    version: "1.18.0"
   mime:
     dependency: transitive
     description:
@@ -515,26 +515,26 @@ packages:
     dependency: "direct dev"
     description:
       name: test
-      sha256: "280d6d890011ca966ad08df7e8a4ddfab0fb3aa49f96ed6de56e3521347a9ae7"
+      sha256: "8d9ceddbab833f180fbefed08afa76d7c03513dfdba87ffcec2718b02bbcbf20"
       url: "https://pub.dev"
     source: hosted
-    version: "1.30.0"
+    version: "1.31.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.10"
+    version: "0.7.11"
   test_core:
     dependency: transitive
     description:
       name: test_core
-      sha256: "0381bd1585d1a924763c308100f2138205252fb90c9d4eeaf28489ee65ccde51"
+      sha256: "1991d4cfe85d5043241acac92962c3977c8d2f2add1ee73130c7b286417d1d34"
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.16"
+    version: "0.6.17"
   typed_data:
     dependency: transitive
     description:
@@ -624,5 +624,5 @@ packages:
     source: hosted
     version: "3.1.3"
 sdks:
-  dart: ">=3.9.0 <4.0.0"
+  dart: ">=3.10.0-0 <4.0.0"
   flutter: ">=3.32.0"

pubspec.yaml

@@ -62,7 +62,7 @@ dev_dependencies:
   integration_test:
     sdk: flutter
 
-  test: 1.30.0
+  test: 1.31.0
   mocktail: 1.0.4
   alchemist: 0.12.1