tsconfig.json

{
  "compileOnSave": true,
  "compilerOptions": {
    "module": "commonjs",
    "outDir": "./lib",
    "baseUrl": "src",
    "target": "es2017",
    "moduleResolution": "node",
    "declaration": true,
    "strict": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "noImplicitReturns": true,
    "strictNullChecks": true,
    "strictBindCallApply": true,
    "noFallthroughCasesInSwitch": true,
    "experimentalDecorators": true,
    "resolveJsonModule": true,
    "stripInternal": true,
    "keyofStringsOnly": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "declarationDir": "./lib/types",
    "allowJs": true
  },
  "include": ["src/**/*", "test/**/*", "examples/**/*", "*.js", ".*.js"],
  "exclude": ["node_modules"]
}