tsconfig.json

{
  "compilerOptions": {
    "lib": [
      "es2015",
      "es2015.promise",
      "es2016",
      "es6",
      "es7",
      "es2017",
      "dom"
    ],
    "outDir": "./dist/commonJs",
    "declaration": true,
    "declarationDir": "./dist/commonJs",
    "moduleResolution": "node",
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true,
    "jsx": "react",
    "rootDirs": [
      "src"
    ],
    "baseUrl": "src",
    "allowJs": false,
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "noErrorTruncation": true,
    "noImplicitAny": true,
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "types": [
      "node",
      "jest"
    ]
  },
  "files": [
    "./src/index.ts"
  ],
  "exclude": [
    "node_modules",
    "**/*.spec.ts",
    "**/*.test.ts"
  ],
  "compileOnSave": false
}