tsconfig.json

{
  "compilerOptions": {
    "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs", /* Specify what module code is generated. */
    "rootDir": ".", /* Specify the root folder within your source files. */
    "outDir": "./dist", /* Specify an output folder for all emitted files. */
    "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
    "strict": true, /* Enable all strict type-checking options. */
    "skipLibCheck": true, /* Skip type checking all .d.ts files. */
    "esModuleInterop": true,
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "noImplicitAny": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "strictNullChecks": true
  },
  "exclude": [
    "node_modules",
    "**/*.spec.ts"
  ]
}