{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es6",
        "outDir": "out",
        "lib": ["es6"],
        "sourceMap": true,
        "rootDir": "src",
        "strict": true,
        "noUnusedLocals": true
    },
    "exclude": ["node_modules", ".vscode-test"]
}

{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es2018",
        "outDir": "out",
        "lib": ["es2018"],
        "sourceMap": true,
        "rootDir": "src",
        "strict": true,
        "noUnusedLocals": true
    },
    "exclude": ["node_modules", ".vscode-test"]
}

Use ES2018 for vscode extension
Use ES2018 for vscode extension

Today's latest vscode v1.40 (Node.jsv12.4/V8 v7.6) supports ES2018
features natively.

We don't have to transform codes to ES6.
