Bump pug from 2.0.4 to 3.0.0

Bumps [pug](https://github.com/pugjs/pug) from 2.0.4 to 3.0.0.
- [Release notes](https://github.com/pugjs/pug/releases)
- [Commits](https://github.com/pugjs/pug/compare/pug@2.0.4...pug@3.0.0)

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

package.json

@@ -29,7 +29,7 @@
     "node-gettext": "^2.0.0",
     "passport": "^0.4.0",
     "passport-local": "^1.0.0",
-    "pug": "^2.0.0",
+    "pug": "^3.0.0",
     "q": "^1.5.0",
     "serve-favicon": "^2.4.3",
     "smtlib": "^0.1.1",