fix: Socket reference error

- Closes #30.

deps.ts

@@ -32,7 +32,13 @@ export {
   Parser,
 } from "https://ghc.deno.dev/tbjgolden/deno-htmlparser2@1f76cdf/htmlparser2/Parser.ts";
 
-export { type Socket } from "https://deno.land/std@0.164.0/node/net.ts";
+import { type Socket as Socket_ } from "https://deno.land/std@0.164.0/node/net.ts";
+
+export let Socket = null as unknown as typeof Socket_;
+
+if (typeof document === "undefined") {
+  Socket = (await import("https://deno.land/std@0.164.0/node/net.ts")).Socket;
+}
 
 import { type SocksClient as SocksClient_ } from "https://deno.land/x/deno_socks@v2.6.1/mod.ts";
 

src/extensions/promised_net_sockets.ts

@@ -1,12 +1,12 @@
 // deno-lint-ignore-file no-explicit-any
-import { Buffer, Mutex, type Socket, SocksClient } from "../../deps.ts";
+import { Buffer, Mutex, Socket, SocksClient } from "../../deps.ts";
 import { ProxyInterface } from "../network/connection/types.ts";
 
 const mutex = new Mutex();
 const closeError = new Error("NetSocket was closed");
 
 export class PromisedNetSockets {
-  private client?: Socket;
+  private client?: InstanceType<typeof Socket>;
   private closed: boolean;
   private stream: Buffer;
   private canRead?: boolean | Promise<boolean>;