Features

• spinner: remove legacy way (span) (f6ee9d0)
• button: add loading option (fe8b2a0)
• spinner: add legacy support (ce8b900)
• spinner: add props (1f3f5f7)
• add basic spinner (691a755)

Fixes

• prevent the button click from bubbling up into a form (3e5b27c)
• spinner: use None as default and custom size (04af99a)