Bump protobufjs from 3.8.2 to 7.2.6

Bumps [protobufjs](https://github.com/protobufjs/protobuf.js) from 3.8.2 to 7.2.6.
- [Release notes](https://github.com/protobufjs/protobuf.js/releases)
- [Changelog](https://github.com/protobufjs/protobuf.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/protobufjs/protobuf.js/compare/3.8.2...protobufjs-v7.2.6)

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

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

package.json

@@ -77,7 +77,7 @@
     "passport": "^0.6.0",
     "passport-oauth2": "^1.1.2",
     "passport-saml": "^0.15.0",
-    "protobufjs": "^3.8.2",
+    "protobufjs": "^7.2.6",
     "proxy-addr": "^2.0.7",
     "pug": "^2.0.0-beta4",
     "request": "^2.67.0",