sindresorhus/is: Type check values

.github/
source/
test/
.editorconfig (175b)
.gitattributes (19b)
.gitignore (44b)
.npmrc (19b)
AGENTS.md (781b)
CLAUDE.md (9b)
header.gif (914.3kb)
license (1.1kb)
package.json (1.6kb)
readme.md (23.1kb)
tsconfig.json (221b)