Fix npm test command

Author: andreas-wirth

extension/.gitignore

@@ -4,3 +4,4 @@ node_modules
 .vscode-test/
 *.vsix
 logs
+.npm/

extension/package.json

@@ -65,9 +65,9 @@
     "build": "tsc -p tsconfig.json",
     "build-watch": "tsc -p tsconfig.json --watch",
     "prettier": "prettier --config .prettierrc --write './src/**/*{.ts,.js,.json}'",
-    "test": "jest --reporters default jest-stare",
+    "test": "vscode-test --config .vscode-test.mjs",
     "test:prettier": "prettier --config .prettierrc --list-different './src/**/*{.ts,.js,.json}'",
-    "test:coverage": "jest --coverage --reporters default jest-stare",
+    "test:coverage": "vscode-test --config .vscode-test.mjs --coverage --coverage-reporter text --coverage-reporter lcov",
     "lint": "eslint . --ext .ts",
     "lint:fix": "eslint . --ext .ts --fix"
   },