build(deps-dev): bump vitest from 3.2.4 to 4.1.7 in /openfeature-provider/js (#439)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicklasl

openfeature-provider/js/package.json

@@ -68,7 +68,7 @@
     "@types/node": "^24.0.1",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.1.7",
     "debug": "^4.4.3",
     "dotenv": "^17.2.2",
     "happy-dom": "^20.3.4",
@@ -80,7 +80,7 @@
     "ts-proto": "^2.7.3",
     "tsdown": "latest",
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^4.1.7"
   },
   "peerDependencies": {
     "@openfeature/core": "^1.0.0",

openfeature-provider/js/src/react/client.test.tsx

@@ -9,6 +9,7 @@ import FlagBundleType, * as FlagBundle from '../flag-bundle';
 import { ErrorCode } from '../types';
 
 type FlagBundle = FlagBundleType;
+type ApplyFn = (flagName: string) => Promise<void>;
 
 const createTestBundle = (flags: FlagBundle['flags'] = {}): FlagBundle => ({
   flags,
@@ -17,7 +18,7 @@ const createTestBundle = (flags: FlagBundle['flags'] = {}): FlagBundle => ({
 });
 
 describe('useFlag', () => {
-  let mockApply: ReturnType<typeof vi.fn>;
+  let mockApply: ReturnType<typeof vi.fn<ApplyFn>>;
 
   beforeEach(() => {
     mockApply = vi.fn().mockResolvedValue(undefined);
@@ -360,7 +361,7 @@ describe('useFlag', () => {
 });
 
 describe('useFlagDetails', () => {
-  let mockApply: ReturnType<typeof vi.fn>;
+  let mockApply: ReturnType<typeof vi.fn<ApplyFn>>;
 
   beforeEach(() => {
     mockApply = vi.fn().mockResolvedValue(undefined);