Run `ember test` from VS Code

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "ember test",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/.bin/ember",
            "args": ["test"],
            "sourceMaps": false,
            "outDir": null
        },
        {
            "name": "ember test --serve",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/.bin/ember",
            "args": ["test", "--serve"],
            "sourceMaps": false,
            "outDir": null
        }
    ]
}