chore: fix eslint

Author: lpatiny

src/__tests__/index.test.js

@@ -1,6 +1,7 @@
-import { SparseMatrix } from '..';
 import { describe, it, expect } from 'vitest';
 
+import { SparseMatrix } from '..';
+
 describe('Sparse Matrix', () => {
   it('mmul', () => {
     let m1 = new SparseMatrix([