test: add setup script for react 19

Author: joshblack

package-lock.json

@@ -58,6 +58,7 @@
     "@prettier/sync": "0.5.5",
     "@primer/stylelint-config": "13.3.0",
     "@size-limit/preset-big-lib": "11.2.0",
+    "@types/semver": "^7.7.1",
     "@vitest/browser": "^4.0.3",
     "@vitest/browser-playwright": "^4.0.3",
     "@vitest/eslint-plugin": "^1.3.24",

package.json

@@ -0,0 +1,43 @@
+import fs from 'node:fs'
+import glob from 'fast-glob'
+import semver from 'semver'
+
+const versions = new Map([
+  ['@types/react', '^19.2.2'],
+  ['@types/react-dom', '^19.2.2'],
+  ['@types/react-is', '^19.2.0'],
+  ['react', '^19.2.0'],
+  ['react-dom', '^19.2.0'],
+  ['react-is', '^19.2.0'],
+])
+
+const packageJsonPaths = glob.sync('{examples,packages}/**/package.json', {
+  ignore: ['**/node_modules/**', '**/dist/**', '**/lib/**', '**/lib-esm/**', '**/.next/**', '**/storybook-static/**'],
+})
+
+const dependencyTypes = new Set(['dependencies', 'devDependencies', 'peerDependencies'])
+
+for (const packageJsonPath of packageJsonPaths) {
+  const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'))
+
+  for (const dependencyType of dependencyTypes) {
+    const dependencies = packageJson[dependencyType]
+
+    if (!dependencies) {
+      continue
+    }
+
+    for (const [pkg, targetRange] of versions) {
+      const range = dependencies[pkg]
+      if (!range) {
+        continue
+      }
+
+      if (!semver.subset(targetRange, range)) {
+        dependencies[pkg] = targetRange
+      }
+    }
+  }
+
+  fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson, null, 2) + '\n', 'utf8')
+}