tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    "module": "es6",
    "moduleResolution": "node",
    "jsx": "react",
    "lib": ["dom", "es6", "es2016", "es2017", "esnext.asynciterable"],
    "outDir": "./build",
    "baseUrl": ".",
    "declarationDir": "./build",
    "sourceMap": true,
    "removeComments": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "resolveJsonModule": true,
    "declaration": true
  },
  "exclude": ["node_modules", "build"],
  "include": ["./src/**/*.tsx"]
}