Remove unused dependencies and refactor proxy handling

In some tests made on the testProxy function, the `new ProxyAgent()` was not working, even adding it the IP result was the same.

I've change it to the `new HttpsProxyAgent()` and it worked.

Refactored the proxy agent to center the same function/creation the same where it is used

src/utils/makeProxyAgent.ts

@@ -0,0 +1,17 @@
+import { HttpsProxyAgent } from 'https-proxy-agent';
+
+import { wa } from '../whatsapp/types/wa.types';
+
+export function makeProxyAgent(proxy: wa.Proxy | string) {
+  if (typeof proxy === 'string') {
+    return new HttpsProxyAgent(proxy);
+  }
+
+  const { host, password, port, protocol, username } = proxy;
+  let proxyUrl = `${protocol}://${host}:${port}`;
+
+  if (username && password) {
+    proxyUrl = `${protocol}://${username}:${password}@${host}:${port}`;
+  }
+  return new HttpsProxyAgent(proxyUrl);
+}