Bump node-addon-api from 4.3.0 to 7.0.0 in /promise-callback-demo/node-addon-api

Dependabot couldn't find the original pull request head commit, 1472587.

Author: dependabot[bot]

promise-callback-demo/node-addon-api/package.json

@@ -3,7 +3,7 @@
   "main": "test/index.js",
   "private": true,
   "dependencies": {
-    "node-addon-api": "^4.0.0"
+    "node-addon-api": "^7.0.0"
   },
   "scripts": {
     "install": "node-gyp rebuild && node test"