Apply suggested fix to plugins/postcss-rebase-url/test/unit/basic.mjs from Copilot Autofix

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: romainmenke

plugins/postcss-rebase-url/test/unit/basic.mjs

@@ -1,7 +1,8 @@
 import assert from 'node:assert';
+import { test } from 'node:test';
 import { rebase } from '../../src/rebase.mjs';
 
-{
+test('does not rebase when from and to directories are identical', () => {
 	assert.equal(
 		rebase(
 			'foo.png',
@@ -10,9 +11,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'foo.png',
 	);
-}
+});
 
-{
+test('rebases relative path from nested directory to parent', () => {
 	assert.equal(
 		rebase(
 			'foo.png',
@@ -21,9 +22,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'components/foo.png',
 	);
-}
+});
 
-{
+test('preserves absolute path when directories are identical', () => {
 	assert.equal(
 		rebase(
 			'/foo.png',
@@ -32,9 +33,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'/foo.png',
 	);
-}
+});
 
-{
+test('preserves absolute path when rebasing from nested directory', () => {
 	assert.equal(
 		rebase(
 			'/foo.png',
@@ -43,9 +44,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'/foo.png',
 	);
-}
+});
 
-{
+test('rebases parent-relative image path from nested directory', () => {
 	assert.equal(
 		rebase(
 			'../images/foo.png',
@@ -54,9 +55,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'images/foo.png',
 	);
-}
+});
 
-{
+test('rebases nested image path from nested directory', () => {
 	assert.equal(
 		rebase(
 			'images/foo.png',
@@ -65,9 +66,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'components/images/foo.png',
 	);
-}
+});
 
-{
+test('rebases path that goes above nested directory', () => {
 	assert.equal(
 		rebase(
 			'../../images/foo.png',
@@ -76,9 +77,9 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'../images/foo.png',
 	);
-}
+});
 
-{
+test('preserves path when base directories do not match', () => {
 	assert.equal(
 		rebase(
 			'../../images/foo.png',
@@ -87,4 +88,4 @@ import { rebase } from '../../src/rebase.mjs';
 		),
 		'../../images/foo.png',
 	);
-}
+});