chore(package): update primus to version 7.2.0

package.json

@@ -38,7 +38,7 @@
     "mocha": "~5.1.0",
     "omega-supreme": "~2.1.0",
     "pre-commit": "~1.2.2",
-    "primus": "~7.1.0",
+    "primus": "~7.2.0",
     "primus-rooms": "~3.4.1",
     "primus-rooms-redis-adapter": "~2.2.0",
     "request": "~2.85.0",