Bump cron from 1.8.3 to 3.1.7

Bumps [cron](https://github.com/kelektiv/node-cron) from 1.8.3 to 3.1.7.
- [Release notes](https://github.com/kelektiv/node-cron/releases)
- [Changelog](https://github.com/kelektiv/node-cron/blob/main/CHANGELOG.md)
- [Commits](kelektiv/node-cron@v1.8.3...v3.1.7)

---
updated-dependencies:
- dependency-name: cron
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -11,7 +11,7 @@
   "license": "MIT",
   "dependencies": {
     "@koa/cors": "^5.0.0",
-    "cron": "^1.8.2",
+    "cron": "^3.1.7",
     "headless-rechain": "git+https://uri",
     "koa": "^2.7.0",
     "koa-bodyparser": "^4.2.1",