fix: add proxy support for aws upload (#198)

src/codeSigning/upload.ts

@@ -8,10 +8,15 @@
 import { basename } from 'path';
 import { fs } from '@salesforce/core';
 import * as AWS from 'aws-sdk';
+import { Agents } from 'got';
+import { WebIdentityCredentials } from 'aws-sdk';
+import { api } from '../codeSigning/packAndSign';
+import ClientConfiguration = WebIdentityCredentials.ClientConfiguration;
 
 export async function putObject(bucket: string, key: string, body: string): Promise<AWS.S3.PutObjectOutput> {
   return new Promise((resolve, reject) => {
-    const s3 = new AWS.S3();
+    const agent = api.getAgentForUri('https://s3.amazonaws.com') as Agents;
+    const s3 = new AWS.S3({ httpsOptions: { agent: [agent.http, agent.https] } } as ClientConfiguration);
     s3.putObject({ Bucket: bucket, Key: key, Body: body }, (err, resp) => {
       if (err) reject(err);
       if (resp) resolve(resp);