fix: instruct web-test-runner NOT to use the browser field in modules, since it messes with packages that also export an esm version

src/Umbraco.Web.UI.Client/web-test-runner.config.mjs

@@ -16,7 +16,7 @@ if (!['dev', 'prod'].includes(mode)) {
 export default {
 	rootDir: '.',
 	files: ['./src/**/*.test.ts'],
-	nodeResolve: { exportConditions: mode === 'dev' ? ['development'] : [], preferBuiltins: false, browser: true },
+	nodeResolve: { exportConditions: mode === 'dev' ? ['development'] : [], preferBuiltins: false, browser: false },
 	browsers: [playwrightLauncher({ product: 'chromium' }), playwrightLauncher({ product: 'webkit' })],
 	coverageConfig: {
 		reporters: ['lcovonly', 'text-summary'],