package: migrate to ES modules

src/cpubench/index.ts

@@ -1,6 +1,6 @@
 import fs from 'fs';
-import { projectRoot } from 'lyc/environment';
 import path from 'path';
+import { projectRoot } from '../environment/index.js';
 
 const cpubenchTemplate = fs.readFileSync(path.resolve(projectRoot, 'assets', 'CPUBenchTemplate.ini')).toString('utf-8');