add changelog

remove unused mux
cleanup k6 test

tests/k6/src/test-issue-162.ts

@@ -1,6 +1,6 @@
 import {sleep, check} from 'k6';
 import {Options} from "k6/options";
-import {defaults, api, utils} from "./lib";
+import {defaults, api} from "./lib";
 
 const files = {
     'kb_50.jpg': open('./_files/kb_50.jpg', 'b'),
@@ -13,7 +13,7 @@ export let options: Options = {
 };
 
 export default () => {
-    const res = api.uploadFile(defaults.accounts.einstein, files['kb_50.jpg'], `kb_50-${utils.randomString()}.jpg`)
+    const res = api.uploadFile(defaults.accounts.einstein, files['kb_50.jpg'], `kb_50-${__VU}-${__ITER}.jpg`)
 
     check(res, {
         'status is 201': () => res.status === 201,