the-honk/challenges/euler/tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "outDir": "build",
        "skipLibCheck": true
    },
    "files": ["src/**/*.ts"],
    "ts-node": {
        "transpileOnly": true,
        "transpiler": "ts-node/transpilers/swc-experimental"
    }
}