fix(package): update riot to version 3.7.4

package.json

@@ -140,7 +140,7 @@
     "redis": "2.8.0",
     "request": "2.83.0",
     "rimraf": "2.6.2",
-    "riot": "3.7.3",
+    "riot": "3.7.4",
     "rndstr": "1.0.0",
     "s-age": "1.1.0",
     "serve-favicon": "2.4.5",