tsconfig.json

{
  "compilerOptions": {
    "alwaysStrict": true,
    "declaration": true,
    "declarationMap": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "allowSyntheticDefaultImports": true,
    "allowJs": true,
    "module": "commonjs",
    "moduleResolution": "node",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "sourceMap": true,
    "skipLibCheck": true,
    "strict": true,
    "target": "es5",
    "lib": ["es6", "dom"],
    "downlevelIteration": true,
    "resolveJsonModule": true,
    "jsx": "react",
    "outDir": "./dist",
    "types": ["jest", "node", "@testing-library/jest-dom"]
  },
  "include": ["src", "tests"]
}