feat(esm): Make vitest an optional peerDep in packages/testing (#378)

Author: Tobbe

packages/testing/package.json

@@ -155,6 +155,14 @@
     "typescript": "5.6.2",
     "vitest": "3.2.4"
   },
+  "peerDependencies": {
+    "vitest": "3.2.4"
+  },
+  "peerDependenciesMeta": {
+    "vitest": {
+      "optional": true
+    }
+  },
   "publishConfig": {
     "access": "public"
   },

yarn.lock

@@ -3532,6 +3532,11 @@ __metadata:
     unplugin-auto-import: "npm:19.3.0"
     vitest: "npm:3.2.4"
     whatwg-fetch: "npm:3.6.20"
+  peerDependencies:
+    vitest: 3.2.4
+  peerDependenciesMeta:
+    vitest:
+      optional: true
   languageName: unknown
   linkType: soft