Add maxRetries option to fs.rm to mitigate EPERM errors on Windows

- When using the `--save-bundle` and `--clean-dir` CLI arguments, we can get intermittent `EPERM` errors on Windows. Passing in the `maxRetries` option to `fs.rm` and `fs.rmdir` functions seems to resolve this issue.

packages/size-limit/rm.js

@@ -5,9 +5,9 @@ export async function rm(dir) {
   if (!fs.rm) {
     /* c8 ignore next 3 */
     if (existsSync(dir)) {
-      await fs.rmdir(dir, { recursive: true })
+      await fs.rmdir(dir, { maxRetries: 3, recursive: true })
     }
   } else {
-    await fs.rm(dir, { force: true, recursive: true })
+    await fs.rm(dir, { force: true, maxRetries: 3, recursive: true })
   }
 }