chore: upgrade bitgo version

chore: remove ed25519 direct dependency

package.json

@@ -16,7 +16,7 @@
     "bitcoind-rpc": "^0.7.0",
     "bitcore-lib": "^0.15.0",
     "bitcore-lib-cash": "git+https://github.com/bitpay/bitcore-lib.git#cash",
-    "bitgo": "4.47.0",
+    "bitgo": "11.15.0",
     "body-parser": "^1.15.1",
     "ccxt": "^1.50.35",
     "coinbase": "^2.0.6",
@@ -26,7 +26,6 @@
     "cookie-parser": "^1.4.3",
     "cors": "^2.8.5",
     "dataloader": "^2.0.0",
-    "ed25519": "git+https://github.com/lamassu/ed25519#3140c985fee9828ce6707202f9f7d55cb1f0b46d",
     "ethereumjs-tx": "^1.3.3",
     "ethereumjs-util": "^5.2.0",
     "ethereumjs-wallet": "^0.6.3",