fix: add error handling code

src/index.mjs

@@ -10,7 +10,7 @@ import History from './lib/history.mjs';
 // load env vars from .env file
 dotenv.config();
 
-export default async function() {
+async function ghActionBot() {
   // parse repo name from cli and create repo instance
   const repo = createRepo(process.argv.splice(2)[0]);
   const {
@@ -64,19 +64,11 @@ export default async function() {
       await deleteComment(repo, comment.id);
     })
   );
-
-  /*
-
-  TODO:
-
-  - [x] keep track of seen comment ids, only process new ones
-  - [x] check the pr's status and only retest if no longer "Pending"
-  - [x] add a retest comment
-    - POST /repos/:owner/:repo/issues/:number/comments
-  - [x] delete the retest comment
-  - [ ] delete the build comment
-  - [ ] delete ALL build failure comments
-    - DELETE /repos/:owner/:repo/issues/comments/:comment_id
-
-  */
+}
+
+export default function() {
+  return ghActionBot().catch(err => {
+    console.error(err);
+    return process.exit(1);
+  });
 }