v9.0.3

Bug Fixes

• core: don't proceed lazy if swiper destroyed
  (4ea0102),
  closes #6322
• core: fix loop handling with virtual
  (69462d2),
  closes #6343
• element: fix converting boolean/string params to module object
  (192e0d4),
  closes #6328
• navigation: allow multiple classes in navigation options
  (#6345)
  (ca49b9f),
  closes #6344
• thumbs: ensure there is a slide to add a class
  (c6294ad),
  closes #6335

Features

• history: allow empty string key
  (a335b09),
  closes #6338