tsconfig.json

{
  "compilerOptions": {
    "target": "ES2016",
    "module": "esnext",
    "lib": ["es2016"],
    "declaration": true,
    "outDir": "./lib",
    "strict": true,
    "noImplicitAny": false,
    "strictNullChecks": false,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": false,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "noFallthroughCasesInSwitch": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": false,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "pretty": true,
    "downlevelIteration": true,
    "sourceMap": true,
    "allowJs": true,
    "declarationDir": "./lib",
    "typeRoots": ["node_modules/@types", "./types"],
    "moduleResolution": "node",
    "baseUrl": ".",
    "paths": {
      "*": ["src/*"]
    }
  },
  "include": ["src/**/*", "types/**/*"],
  "exclude": ["node_modules", "lib"]
}