Update vscode-languageclient to 4.4.0

Requires vscode 1.25

Author: lukel97

package-lock.json

@@ -6,7 +6,7 @@
   "license": "MIT",
   "publisher": "alanz",
   "engines": {
-    "vscode": "^1.22.0"
+    "vscode": "^1.25.0"
   },
   "keywords": ["language", "haskell", "lsp", "multi-root ready"],
   "homepage": "https://github.com/alanz/vscode-hie-server",
@@ -218,6 +218,6 @@
     "lru-cache": "^4.1.3",
     "request": "^2.86.0",
     "request-promise-native": "^1.0.5",
-    "vscode-languageclient": "^4.2.0"
+    "vscode-languageclient": "^4.4.0"
   }
 }