update build

Author: MissingNoo

deno.json

@@ -9,7 +9,7 @@
     "cli": "echo \"import '\\$fresh/src/dev/cli.ts'\" | deno run --unstable -A -",
     "manifest": "deno task cli manifest $(pwd)",
     "start": "deno run -A --watch=static/,routes/ --unstable-kv dev.ts",
-    "build": "deno run -A dev.ts build",
+    "build": "deno run -A dev.ts --unstable-kv build",
     "preview": "deno run -A main.ts",
     "update": "deno run -A -r https://fresh.deno.dev/update ."
   },