onion-core/tsconfig.json

{
  "compilerOptions": {
    "types": ["mocha", "node"],
    "target": "es6",
    "sourceMap": true,
    "noImplicitThis": true,
    "strictBindCallApply": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "alwaysStrict": true,
    "moduleResolution": "node",
    "module": "commonjs",
    "declaration": true,
    "outDir": "./dist"
  },
  "include": ["test/**/*.test.ts"]
}