migrate vitest config file

packages/pluginkit/vitest.config.ts

@@ -10,10 +10,12 @@ export default defineConfig({
     clearMocks: true,
     globals: true,
     coverage: {
-      lines: 100,
-      functions: 100,
-      branches: 100,
-      statements: 100,
+      thresholds: {
+        lines: 100,
+        functions: 100,
+        branches: 100,
+        statements: 100,
+      },
     },
   },
 });