replace nock with fetch-mock, run tests simultaneously

Author: gr2m

lib/octokit.js

@@ -12,7 +12,6 @@ import { throttling } from "@octokit/plugin-throttling";
 import urljoin from "url-join";
 import { HttpProxyAgent } from "http-proxy-agent";
 import { HttpsProxyAgent } from "https-proxy-agent";
-import nodeFetch from "node-fetch";
 
 import { RETRY_CONF } from "./definitions/retry.js";
 import { THROTTLE_CONF } from "./definitions/throttle.js";
@@ -45,7 +44,7 @@ export const SemanticReleaseOctokit = Octokit.plugin(
 
 /**
  * @param {{githubToken: string, proxy: any} | {githubUrl: string, githubApiPathPrefix: string, githubToken: string, proxy: any}} options
- * @returns {{ auth: string, baseUrl: undefined | string, request: { agent?: any, fetch: nodeFetch } }}
+ * @returns {{ auth: string, baseUrl?: string, request: { agent?: any } }}
  */
 export function toOctokitOptions(options) {
   const baseUrl =
@@ -62,14 +61,9 @@ export function toOctokitOptions(options) {
     : undefined;
 
   return {
-    baseUrl,
+    ...(baseUrl ? { baseUrl } : {}),
     auth: options.githubToken,
     request: {
-      // TODO: we temporary use use `node-fetch` because `nock` does not support
-      // mocking Node's native fetch yet. The plan is to replace nock with `fetch-mock`
-      // before merging this PR.
-      fetch: nodeFetch,
-
       agent,
     },
   };