Fix bounds on @types/vscode

Can't be higher than the engine version

Author: lukel97

package-lock.json

@@ -203,7 +203,7 @@
     "@types/lru-cache": "^4.1.2",
     "@types/node": "^14.0.3",
     "@types/request-promise-native": "^1.0.17",
-    "@types/vscode": "^1.48.0",
+    "@types/vscode": "^1.39.0",
     "@types/yauzl": "^2.9.1",
     "husky": "^4.2.5",
     "prettier": "^2.0.5",