Remove superagent-proxy dep completely and use proxy-agent directly

Author: DmitriyKirakosyan

package.json

@@ -13,7 +13,7 @@
     "build:release": "tsc -p ./tsconfig-release.json && npm run content",
     "test": "npm run build && mocha --recursive bin/test",
     "test:debugger": "mocha --recursive --inspect-brk=0.0.0.0 bin/test",
-    "content": "shx cp {plugin.xml,README.md,package.json,.npmignore} bin && cp src/utils/*.js bin/utils/"
+    "content": "shx cp {plugin.xml,README.md,package.json,.npmignore} bin"
   },
   "repository": {
     "type": "git",

src/utils/request-manager.ts

@@ -1,10 +1,8 @@
 import superagent = require("superagent");
+import { ProxyAgent } from "proxy-agent";
 import { CodePushUnauthorizedError } from "../script/code-push-error"
 import { CodePushError, Headers } from "../script/types";
 
-import superagent_setup from "./superagent-proxy.js";
-superagent_setup(superagent);
-
 interface JsonResponse {
     headers: Headers;
     body?: any;
@@ -52,7 +50,11 @@ class RequestManager {
     private makeApiRequest(method: string, endpoint: string, requestBody: string, expectResponseBody: boolean, contentType: string): Promise<JsonResponse> {
         return new Promise<any>((resolve, reject) => {
             var request: superagent.Request = (<any>superagent)[method](this._serverUrl + endpoint);
-            if (this._proxy) (<any>request).proxy(this._proxy);
+
+            if (this._proxy) {
+                (<superagent.SuperAgentRequest>request).agent(new ProxyAgent({ getProxyForUrl: () => this._proxy }))
+            }
+
             this.attachCredentials(request);
 
             if (requestBody) {