Upgrade vscode-test dependency to 1.4.0

Author: jcreedcmu

common/config/rush/pnpm-lock.yaml

@@ -597,7 +597,7 @@
     "typescript-config": "^0.0.1",
     "typescript-formatter": "^7.2.2",
     "vsce": "^1.65.0",
-    "vscode-test": "^1.0.0",
+    "vscode-test": "^1.4.0",
     "webpack": "^4.38.0",
     "webpack-cli": "^3.3.2",
     "eslint": "~6.8.0",