Bump xxhash-addon from 1.4.0 to 1.5.0 in /plugins/push

Bumps [xxhash-addon](https://github.com/ktrongnhan/xxhash-addon) from 1.4.0 to 1.5.0.
- [Release notes](https://github.com/ktrongnhan/xxhash-addon/releases)
- [Changelog](https://github.com/ktrongnhan/xxhash-addon/blob/master/CHANGELOG.md)
- [Commits](ktrongnhan/xxhash-addon@v1.4.0...v1.5.0)

---
updated-dependencies:
- dependency-name: xxhash-addon
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

plugins/push/package-lock.json

@@ -22,7 +22,7 @@
   "dependencies": {
     "jsonwebtoken": "8.0.1",
     "node-forge": "1.3.1",
-    "xxhash-addon": "1.4.0"
+    "xxhash-addon": "1.5.0"
   },
   "private": true
 }