fix(deps): update react monorepo to v19

Author: renovate[bot]

example/package.json

@@ -19,13 +19,13 @@
     "@zendeskgarden/react-typography": "9.3.0",
     "@zendeskgarden/tailwindcss": "4.0.2",
     "classnames": "2.5.1",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.0.0",
+    "react-dom": "19.0.0",
     "styled-components": "6.1.13"
   },
   "devDependencies": {
-    "@types/react": "18.3.14",
-    "@types/react-dom": "18.3.2",
+    "@types/react": "19.0.9",
+    "@types/react-dom": "19.0.3",
     "@vitejs/plugin-react-swc": "3.7.2",
     "@zendeskgarden/eslint-config": "44.0.1",
     "@zendeskgarden/scripts": "2.4.3",

package-lock.json

@@ -31,8 +31,8 @@
     "@zendeskgarden/react-theming": "^9.0.0",
     "polished": "^4.1.1",
     "postcss": "^8.2.8",
-    "react": "^18.0.0",
-    "react-dom": "^18.0.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
     "styled-components": "^6.0.0"
   },
   "peerDependencies": {
@@ -52,7 +52,7 @@
     "postcss-cli": "11.0.0",
     "prettier": "3.4.2",
     "prettier-package-json": "2.8.0",
-    "react-is": "18.3.1",
+    "react-is": "19.0.0",
     "rollup": "4.28.0",
     "rollup-plugin-delete": "2.1.0",
     "rollup-plugin-node-polyfills": "0.2.1",