[New] core: wasi is a core module in node v13.4+

Author: ljharb

lib/core.json

@@ -69,6 +69,7 @@
     "v8/tools/splaytree": [">= 4.4.0 && < 5", ">= 5.2.0 && < 12"],
     "v8": ">= 1",
     "vm": true,
+    "wasi": ">= 13.4",
     "worker_threads": ">= 11.7",
     "zlib": true
 }