servers: update testnet default list

closes #5293

electrum/servers_testnet.json

@@ -1,31 +1,38 @@
 {
-    "electrumx.kekku.li": {
-        "pruning": "-",
-        "s": "51002",
-        "version": "1.2"
-    },
     "hsmithsxurybd7uh.onion": {
         "pruning": "-",
         "s": "53012",
         "t": "53011",
-        "version": "1.2"
+        "version": "1.4"
     },
     "testnet.hsmiths.com": {
         "pruning": "-",
         "s": "53012",
         "t": "53011",
-        "version": "1.2"
+        "version": "1.4"
     },
     "testnet.qtornado.com": {
         "pruning": "-",
         "s": "51002",
         "t": "51001",
-        "version": "1.2"
+        "version": "1.4"
     },
     "testnet1.bauerj.eu": {
         "pruning": "-",
         "s": "50002",
         "t": "50001",
-        "version": "1.2"
+        "version": "1.4"
+    },
+    "tn.not.fyi": {
+        "pruning": "-",
+        "s": "55002",
+        "t": "55001",
+        "version": "1.4"
+    },
+    "bitcoin.cluelessperson.com": {
+        "pruning": "-",
+        "s": "51002",
+        "t": "51001",
+        "version": "1.4"
     }
 }