tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "target": "es2017",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "incremental": true,
    // enable strict null checks as a best practice
    "strictNullChecks": true,
    // Search under node_modules for non-relative imports.
    "moduleResolution": "node",
    // Process & infer types from .js files.
    "allowJs": true,
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": true,
    // Import non-ES modules as default imports.
    "esModuleInterop": true,
    "alwaysStrict": true,
    "allowUnreachableCode": false,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "typeRoots": [
      "src/@types",
      "node_modules/@types",
    ],
    "skipLibCheck": true,
    "resolveJsonModule": true
  }
}