Update dependency vscode-languageclient to v9

Author: renovate[bot]

vscode-client/package.json

@@ -139,7 +139,7 @@
   },
   "dependencies": {
     "bash-language-server": "5.2.0",
-    "vscode-languageclient": "8.1.0",
+    "vscode-languageclient": "9.0.1",
     "vscode-languageserver": "8.0.2"
   },
   "devDependencies": {