tsconfig.json

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "baseUrl": ".",
    "outDir": "./dist",
    "module": "esnext",
    "target": "es2017",
    "lib": ["es6", "dom", "esnext.asynciterable", "es2017"],
    "sourceMap": true,
    "allowJs": true,
    "jsx": "react",
    "moduleResolution": "node",
    "rootDir": "./src",
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "noUnusedLocals": true,
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "removeComments": true,
    "esModuleInterop": true,
    "resolveJsonModule": true,
    "declaration": true,
    "emitDecoratorMetadata": true,
    // "declarationDir": "./dist",
    // declaration output file
  },
  "exclude": [
    "node_modules",
    "build",
    "scripts",
    "acceptance-tests",
    "webpack",
    "jest",
    "src/setupTests.ts",
    "jest.config.js",
    "__tests__",
    "dist"
    ,
    "coverage"
  ]
}