Update Xylume TestNet metadata and icon (#7760)

* Update faucet URL and listed EIP features.

* Update Icon [CRUCIAL]

Old icon is no longer used in relevance with Xylume TestNet, and belongs to a now-separate entity (XYL TestNet)

* Prettier FIX

* Prettier FIX

---------

Co-authored-by: Frederik Bolding <frederik.bolding@gmail.com>

Author: debxylen

_data/chains/eip155-6934.json

@@ -2,16 +2,18 @@
   "name": "Xylume TestNet",
   "chain": "XYL",
   "rpc": ["https://xylume-testnet.sparked.network/rpc/"],
-  "faucets": ["https://debxylen.github.io/Xylume_TestNet/faucet.html"],
+  "faucets": ["https://xylume-faucet.vercel.app/"],
   "nativeCurrency": {
     "name": "Xylume",
     "symbol": "XYL",
     "decimals": 18
   },
   "features": [
+    { "name": "EIP20" },
     { "name": "EIP155" },
     { "name": "EIP1559" },
-    { "name": "Directed Acyclic Graph (DAG)" }
+    { "name": "Directed Acyclic Graph (DAG)" },
+    { "name": "Unspent Transaction Output (UTXO)" }
   ],
   "infoURL": "https://debxylen.github.io/Xylume_TestNet",
   "shortName": "xyl",

_data/icons/xylume-testnet.json

@@ -1,8 +1,8 @@
 [
   {
-    "url": "ipfs://QmRk9t6g5otTX6XcQjvFwsfzn2KjZwbstptH9C7uG2kVdD",
-    "width": 500,
-    "height": 500,
+    "url": "ipfs://QmUweMnhb4wYtwv59gh4GSxhDy6AbnRntXiQRe4mFFazcF",
+    "width": 1024,
+    "height": 1024,
     "format": "png"
   }
 ]