vscode-extension-samples/tree-view-sample/tsconfig.json

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