fix tslint required providers error for random

Author: kay-kim

examples/simple/main.tf

@@ -6,6 +6,10 @@ terraform {
       source  = "hashicorp/google"
       version = ">= 6.0"
     }
+    random = {
+      source  = "hashicorp/random"
+      version = "~> 3.0"
+    }
   }
 }