Bump vscode-languageclient from 5.2.1 to 6.1.0

Bumps [vscode-languageclient](https://github.com/Microsoft/vscode-languageserver-node/tree/HEAD/client) from 5.2.1 to 6.1.0.
- [Release notes](https://github.com/Microsoft/vscode-languageserver-node/releases)
- [Commits](https://github.com/Microsoft/vscode-languageserver-node/commits/release/client/6.1.0/client)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "node-fetch": "^2.6.0",
     "semver": "^7.1.1",
     "vscode-extension-telemetry": "~0.1.2",
-    "vscode-languageclient": "~5.2.1"
+    "vscode-languageclient": "~6.1.0"
   },
   "devDependencies": {
     "@types/glob": "^7.1.1",