Add DeepOnion (ONION)

src/js/bitcoinjs-extensions.js

@@ -1537,4 +1537,15 @@ bitcoinjs.bitcoin.networks.blockstamp = {
   pubKeyHash: 0x00,
   scriptHash: 0x05,
   wif:  0x80,
-};
+};
+
+bitcoinjs.bitcoin.networks.deeponion = {
+    messagePrefix: 'x18DeepOnion Signed Message:\n',
+    bip32: {
+      public: 0x0488B21E,
+      private: 0x0488ADE4,
+    },
+    pubKeyHash: 0x1F,
+    scriptHash: 0x4E,
+    wif: 0x9F,
+};