implement proxy speed check

helpers.js

@@ -0,0 +1,14 @@
+const convertProxyListToString = (proxyList) => {
+    if (Array.isArray(proxyList)){
+        let result = '';
+        proxyList.forEach(proxyServer => {
+            result += `[${proxyServer.timeToFetch}]` + proxyServer.address + '\r\n';
+        });
+        return result;
+    }
+    console.log('[ERROR](convertProxyListToString) Proxy list is not an array')
+    console.log(proxyList);
+    return '';
+}
+
+exports.convertProxyListToString = convertProxyListToString;