tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es2017",
    "moduleResolution": "node",
    "esModuleInterop": true,
    "inlineSourceMap": true,
    "skipLibCheck": true,
    "outDir": "dist",
    "declaration": false,
    "experimentalDecorators": true,
    "allowJs": true,
    "strict": true /* Enable all strict type-checking options. */,
    "noImplicitAny": false /* Raise error on expressions and declarations with an implied 'any' type. */,
    "strictNullChecks": true /* Enable strict null checks. */,
    "strictPropertyInitialization": false /* Enable strict checking of property initialization in classes. */,
    "noUnusedLocals": false /* Report errors on unused locals. */,
    "noUnusedParameters": false /* Report errors on unused parameters. */,
    "baseUrl": "./src",
    "rootDir": "./src",
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "noImplicitReturns": true
  },
  "include": ["**/*.ts", "./src/**/*.js"],
  "exclude": ["node_modules", "dist", "tsconfig.json"]
}