Use CRLF endings for writing to package.json

Prevents diffs from showing the file as modified even though the only
differences are the line endings written by Rollup.
Should make absolutely no differences in code, just a QOL DX change.

Also suppress the "unused variable" warning.

rollup.config.mjs

@@ -33,8 +33,9 @@ pkg.exports = files.reduce((acc, file) => {
 }, {});
 
 // write updated package.json
-await fs.writeJSON('./package.json', pkg, { spaces: 2 });
+await fs.writeJSON('./package.json', pkg, { spaces: 2, EOL: '\r\n' });
 
+// noinspection JSUnusedGlobalSymbols
 export default async () => {
   console.log(files.map(f => f.path));