Updated @actions/* and @octokit/* dependencies (#477)

src/octokit.ts

@@ -1,10 +1,11 @@
 import * as core from "@actions/core";
-import { GitHub, getOctokitOptions } from "@actions/github/lib/utils";
+import { getOctokit } from "@actions/github";
 import { throttling } from "@octokit/plugin-throttling";
 
 export const setupOctokit = (githubToken: string) => {
-  return new (GitHub.plugin(throttling))(
-    getOctokitOptions(githubToken, {
+  return getOctokit(
+    githubToken,
+    {
       throttle: {
         onRateLimit: (retryAfter, options: any, octokit, retryCount) => {
           core.warning(
@@ -32,7 +33,8 @@ export const setupOctokit = (githubToken: string) => {
           }
         },
       },
-    })
+    },
+    throttling
   );
 };