Bump shelljs from 0.8.4 to 0.8.5 in /messages

Bumps [shelljs](https://github.com/shelljs/shelljs) from 0.8.4 to 0.8.5.
- [Release notes](https://github.com/shelljs/shelljs/releases)
- [Changelog](https://github.com/shelljs/shelljs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/shelljs/shelljs/compare/v0.8.4...v0.8.5)

---
updated-dependencies:
- dependency-name: shelljs
  dependency-type: direct:development
...

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

messages/package.json

@@ -38,7 +38,7 @@
     "prettier": "^2.3.1",
     "protobufjs": "^6.10.1",
     "rimraf": "^3.0.2",
-    "shelljs": "^0.8.4",
+    "shelljs": "^0.8.5",
     "typescript": "^4.0.5"
   },
   "repository": {