Bump test from 1.25.9 to 1.25.12

Bumps [test](https://github.com/dart-lang/test/tree/master/pkgs) from 1.25.9 to 1.25.12.
- [Release notes](https://github.com/dart-lang/test/releases)
- [Commits](https://github.com/dart-lang/test/commits/test-v1.25.12/pkgs)

---
updated-dependencies:
- dependency-name: test
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pubspec.lock

@@ -742,10 +742,10 @@ packages:
     dependency: "direct dev"
     description:
       name: test
-      sha256: f2a018e2baa6fce7c8daa55b8bdf4b3d7d165f82caac269e4cbe5edd666c0e4c
+      sha256: "22eb7769bee38c7e032d532e8daa2e1cc901b799f603550a4db8f3a5f5173ea2"
       url: "https://pub.dev"
     source: hosted
-    version: "1.25.9"
+    version: "1.25.12"
   test_api:
     dependency: transitive
     description:
@@ -758,10 +758,10 @@ packages:
     dependency: transitive
     description:
       name: test_core
-      sha256: "60ff490bb383858015df7b7a0d883301a426edf9033989f55f091d91efb9dfaf"
+      sha256: "84d17c3486c8dfdbe5e12a50c8ae176d15e2a771b96909a9442b40173649ccaa"
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.6"
+    version: "0.6.8"
   tfchain_client:
     dependency: "direct main"
     description: