chore(challenges-utils): Typescript migration of Challenges util postUpdate$.js (#45601)

* Rename to .ts

* Typescript migration of Challenges/utils/postUpdate$.js

client/src/redux/failed-updates-epic.js

@@ -13,7 +13,7 @@ import { v4 as uuid } from 'uuid';
 
 import { backEndProject } from '../../utils/challenge-types';
 import { isGoodXHRStatus } from '../templates/Challenges/utils';
-import postUpdate$ from '../templates/Challenges/utils/postUpdate$';
+import postUpdate$ from '../templates/Challenges/utils/post-update';
 import { actionTypes } from './action-types';
 import {
   serverStatusChange,

client/src/templates/Challenges/redux/completion-epic.js

@@ -20,7 +20,7 @@ import {
   updateFailed
 } from '../../../redux';
 
-import postUpdate$ from '../utils/postUpdate$';
+import postUpdate$ from '../utils/post-update';
 import { mapFilesToChallengeFiles } from '../../../utils/ajax';
 import { standardizeRequestBody } from '../../../utils/challenge-request-helpers';
 import { actionTypes } from './action-types';

client/src/templates/Challenges/utils/post-update.ts

@@ -0,0 +1,14 @@
+import { from, Observable } from 'rxjs';
+import { post } from '../../../utils/ajax';
+
+interface PostData {
+  endpoint: string;
+  payload: unknown;
+}
+
+export default function postUpdate$({
+  endpoint,
+  payload
+}: PostData): Observable<void> {
+  return from(post(endpoint, payload));
+}

client/src/templates/Challenges/utils/postUpdate$.js

@@ -1,6 +0,0 @@
-import { from } from 'rxjs';
-import { post } from '../../../utils/ajax';
-
-export default function postUpdate$({ endpoint, payload }) {
-  return from(post(endpoint, payload));
-}