Add tests

Author: thecrypticace

packages/tailwindcss-language-service/package.json

@@ -44,6 +44,7 @@
     "@types/line-column": "^1.0.2",
     "@types/node": "^18.19.33",
     "@types/stringify-object": "^4.0.5",
+    "dedent": "^1.5.3",
     "esbuild": "^0.25.0",
     "esbuild-node-externals": "^1.9.0",
     "minimist": "^1.2.8",