tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    "module": "commonjs",
    "lib": ["dom", "es6", "es2017", "esnext.asynciterable"],
    "sourceMap": true,
    "skipLibCheck": true,
    "outDir": "./build",
    "moduleResolution": "node",
    "removeComments": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "resolveJsonModule": true,
    "typeRoots": ["./node_modules/@types", "./src/types"],
    "baseUrl": "src/",
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true
  },
  "include": ["app-env.d.ts", "./src/**/*.tsx", "./src/**/*.ts", ".src/__tests__/**/*"],
  "exclude": ["node_modules", "./src/artifacts/**/*.ts", "test/**/*.ts", ]
}