fix licenses.yaml drift vs pubspec

- test: 1.30.0 → 1.31.0 (matches pubspec dev_dependencies)
- tree-sitter purpose: stale app/native/ path → native/linux-x64/

Surfaced by the T-25 audit and the 2026-05-14 security review. The
"phantom lints entry" that review also flagged is already gone.

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

assets/licenses.yaml

@@ -144,7 +144,7 @@ dependencies:
     purpose: >-
       Incremental parsing library with embedded WASM grammar engine.
       Vendored as libtree-sitter.so (wasmtime statically linked) in
-      app/native/. Called via dart:ffi. Loads grammar .wasm files
+      native/linux-x64/. Called via dart:ffi. Loads grammar .wasm files
       through its built-in WASM store API.
 
   - name: wasmtime
@@ -232,7 +232,7 @@ dev_dependencies:
 
   - name: test
     kind: dart-package
-    version: "1.30.0"
+    version: "1.31.0"
     homepage: https://pub.dev/packages/test
     license: BSD-3-Clause
     purpose: >-