fix(eio-client/types): remove ws type from .d.ts file

Before this change, the following error would be thrown when compiling
with TypeScript:

```
node_modules/engine.io-client/build/esm/transports/websocket.node.d.ts:12:101 - error TS1340: Module 'ws' does not refer to a type, but is used as a type here. Did you mean 'typeof import('ws')'?

12     createSocket(uri: string, protocols: string | string[] | undefined, opts: Record<string, any>): import("ws");
                                                                                                       ~~~~~~~~~~~~
```

This behavior was introduced in [1], included in version `6.6.0`.

The return type is forced as `any`, so that the `@types/ws` dependency
is optional.

[1]: f4d898e

Related: #5202

Author: darrachequesne

.github/workflows/build-examples.yml

@@ -19,6 +19,8 @@ jobs:
           - custom-parsers
           - typescript-example/cjs
           - typescript-example/esm
+          - typescript-client-example/cjs
+          - typescript-client-example/esm
           - webpack-build
           - webpack-build-server
           - basic-crud-application/angular-client

examples/typescript-client-example/cjs/client.ts

@@ -0,0 +1,30 @@
+import { io, type Socket } from "socket.io-client";
+
+interface ServerToClientEvents {
+    hello: (val: string) => void;
+}
+
+interface ClientToServerEvents {
+    ping: (cb: () => void) => void;
+}
+
+const socket: Socket<ServerToClientEvents, ClientToServerEvents> = io("ws://localhost:8080/");
+
+socket.on("connect", () => {
+    console.log(`connect ${socket.id}`);
+});
+
+socket.on("hello", (val) => {
+    console.log(`got ${val}`);
+});
+
+socket.on("disconnect", () => {
+    console.log(`disconnect`);
+});
+
+setInterval(() => {
+    const start = Date.now();
+    socket.emit("ping", () => {
+        console.log(`pong (latency: ${Date.now() - start} ms)`);
+    });
+}, 1000);

examples/typescript-client-example/cjs/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "typescript-client-example-cjs",
+  "version": "0.0.1",
+  "description": "An example with TypeScript",
+  "type": "commonjs",
+  "private": true,
+  "scripts": {
+    "build": "tsc",
+    "start": "ts-node client.ts"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "socket.io-client": "^4.8.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.4.5"
+  }
+}

examples/typescript-client-example/cjs/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "outDir": "dist",
+    "target": "es2022",
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
+    "strict": true
+  }
+}

examples/typescript-client-example/esm/client.ts

@@ -0,0 +1,30 @@
+import { io, type Socket } from "socket.io-client";
+
+interface ServerToClientEvents {
+    hello: (val: string) => void;
+}
+
+interface ClientToServerEvents {
+    ping: (cb: () => void) => void;
+}
+
+const socket: Socket<ServerToClientEvents, ClientToServerEvents> = io("ws://localhost:8080/");
+
+socket.on("connect", () => {
+    console.log(`connect ${socket.id}`);
+});
+
+socket.on("hello", (val) => {
+   console.log(`got ${val}`);
+});
+
+socket.on("disconnect", () => {
+    console.log(`disconnect`);
+});
+
+setInterval(() => {
+    const start = Date.now();
+    socket.emit("ping", () => {
+        console.log(`pong (latency: ${Date.now() - start} ms)`);
+    });
+}, 1000);

examples/typescript-client-example/esm/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "typescript-client-example-esm",
+  "version": "0.0.1",
+  "description": "An example with TypeScript",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "build": "tsc",
+    "start": "node --no-warnings=ExperimentalWarning --loader ts-node/esm client.ts"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "socket.io-client": "^4.8.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.4.5"
+  }
+}

examples/typescript-client-example/esm/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "outDir": "dist",
+    "target": "es2022",
+    "module": "esnext",
+    "moduleResolution": "node",
+    "strict": true
+  }
+}

packages/engine.io-client/lib/transports/websocket.node.ts

@@ -15,7 +15,7 @@ export class WS extends BaseWS {
     uri: string,
     protocols: string | string[] | undefined,
     opts: Record<string, any>,
-  ) {
+  ): any {
     if (this.socket?._cookieJar) {
       opts.headers = opts.headers || {};