Upgrade eslint (#1014)

It's apparently forced now to use the eslint.config.js instead of
.eslintrc

It got more strict with requiring the underscore on unused vars like
`catch(_err)` , but that was all

Closes #1012
Closes #995
Closes #992

## Launch Checklist

<!-- Thanks for the PR! Feel free to add or remove items from the
checklist. -->


 - [ ] Briefly describe the changes in this PR.
 - [ ] Link to related issues.
- [ ] Include before/after visuals or gifs if this PR includes visual
changes.
 - [ ] Write tests for all new functionality.
 - [ ] Add an entry to `CHANGELOG.md` under the `## main` section.

build/release-notes.js

@@ -20,14 +20,14 @@ const changelog = fs.readFileSync(changelogPath, 'utf8');
 */
 const regex = /^## (\d+\.\d+\.\d+.*?)\n(.+?)(?=\n^## \d+\.\d+\.\d+.*?\n)/gms;
 
-let releaseNotes = [];
+const releaseNotes = [];
 let match;
 // eslint-disable-next-line no-cond-assign
 while (match = regex.exec(changelog)) {
-    releaseNotes.push({
-        'version': match[1],
-        'changelog': match[2].trim(),
-    });
+  releaseNotes.push({
+    'version': match[1],
+    'changelog': match[2].trim(),
+  });
 }
 
 const latest = releaseNotes[0];
@@ -44,5 +44,4 @@ const templatedReleaseNotes = `${header}
 
 ${latest.changelog}`;
 
-// eslint-disable-next-line eol-last
 process.stdout.write(templatedReleaseNotes.trimEnd());