replace ssh2 with russh

app/package.json

@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@electron/remote": "^2",
-    "node-pty": "^1.0",
+    "node-pty": "^1.1.0-beta.14",
     "any-promise": "^1.3.0",
     "electron-config": "2.0.0",
     "electron-debug": "^3.2.0",
@@ -30,6 +30,7 @@
     "native-process-working-directory": "^1.0.2",
     "npm": "6",
     "rxjs": "^7.5.7",
+    "russh": "0.0.3",
     "source-map-support": "^0.5.20",
     "v8-compile-cache": "^2.3.0",
     "yargs": "^17.7.2"