test(types): add --exactOptionalPropertyTypes option (#704)

Author: oscard0m

package-lock.json

@@ -13,7 +13,7 @@
     "lint:fix": "prettier --write '{src,test}/**/*.{ts,md}' README.md package.json",
     "pretest": "npm run -s lint",
     "test": "vitest --coverage",
-    "test:typescript": "npx tsc --noEmit --declaration --noUnusedLocals --module node16 --moduleResolution node16 --allowImportingTsExtensions test/typescript-validate.ts"
+    "test:typescript": "npx tsc --noEmit --declaration --noUnusedLocals --module node16 --moduleResolution node16 --allowImportingTsExtensions --exactOptionalPropertyTypes --strict test/typescript-validate.ts"
   },
   "repository": "github:octokit/core.js",
   "keywords": [
@@ -38,7 +38,7 @@
     "@octokit/auth-action": "^5.0.0",
     "@octokit/auth-app": "^7.0.0",
     "@octokit/auth-oauth-app": "^8.0.0",
-    "@octokit/tsconfig": "^3.0.0",
+    "@octokit/tsconfig": "^4.0.0",
     "@sinonjs/fake-timers": "^13.0.0",
     "@types/jest": "^29.0.0",
     "@types/lolex": "^5.1.0",