clean up nip89 with suggested params in the nip, replace nip04 with nip44 for encryption

main.py

@@ -26,8 +26,8 @@ def playground(announce=False):
         "name": name,
         "picture": "https://image.nostr.build/28da676a19841dcfa7dcf7124be6816842d14b84f6046462d2a3f1268fe58d03.png",
         "about": "I'm just a demo DVM, not doing much.'",
-        "encryptionSupported": True,
-        "cashuAccepted": True,
+        "supportsEncryption": True,
+        "acceptsNutZaps": dvm_config.ENABLE_NUTZAP,
         "nip90Params": {
         }
     }