native fetch with proxy support on node api

src/globals.d.ts

@@ -1,3 +1,28 @@
 declare function escape(s: string): string;
 declare function unescape(s: string): string;
 declare module 'duo_web_sdk';
+
+// From: https://github.com/TooTallNate/node-https-proxy-agent/issues/27
+declare module 'https-proxy-agent' {
+    import * as https from 'https'
+
+    namespace HttpsProxyAgent {
+        interface HttpsProxyAgentOptions {
+            host: string
+            port: number
+            secureProxy?: boolean
+            headers?: {
+                [key: string]: string
+            }
+            [key: string]: any
+        }
+    }
+
+    // HttpsProxyAgent doesnt *actually* extend https.Agent, but for my purposes I want it to pretend that it does
+    class HttpsProxyAgent extends https.Agent {
+        constructor(opts: string)
+        constructor(opts: HttpsProxyAgent.HttpsProxyAgentOptions)
+    }
+
+    export = HttpsProxyAgent
+}