Fix config types for boxShadow (#14856)

`boxShadow` accepts multiple shadows just like `dropShadow` does. This
patch fixes the TS typings to reflect that.

See demo showing that multiple shadows are supported (complete with it
incorrectly complaining that the config is bad) here:
https://play.tailwindcss.com/VHqWbbEIrz?file=config

---------

Co-authored-by: Philipp Spiess <hello@philippspiess.com>

Author: tremby

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Bump versions for security vulnerabilities ([#14697](https://github.com/tailwindlabs/tailwindcss/pull/14697))
+- Ensure the TypeScript types for the `boxShadow` theme configuration allows arrays ([#14856](https://github.com/tailwindlabs/tailwindcss/pull/14856))
 
 ## [3.4.14] - 2024-10-15
 

types/config.d.ts

@@ -207,7 +207,7 @@ export interface ThemeConfig {
   caretColor: ThemeConfig['colors']
   accentColor: ThemeConfig['colors']
   opacity: ResolvableTo<KeyValuePair>
-  boxShadow: ResolvableTo<KeyValuePair>
+  boxShadow: ResolvableTo<KeyValuePair<string, string | string[]>>
   boxShadowColor: ThemeConfig['colors']
   outlineWidth: ResolvableTo<KeyValuePair>
   outlineOffset: ResolvableTo<KeyValuePair>