Update Bot to latest Discordeno Version 21.0.0 and add nsfw check for rule34 and yandere api calls

src/plugins/rule34/messages.ts

@@ -1,4 +1,4 @@
-import { Bot, DiscordEmbedAuthor, Message } from "npm:discordeno@18.0.1";
+import { Bot, Message } from "@discordeno";
 import { drop, help, requestWorker } from "./plugin.ts";
 import { logMessage } from "@root/logging.ts";
 import { defaultString } from "@root/defaultString.ts";