tsconfig.json

{
  "compilerOptions": {
    "lib": ["ES2019", "DOM", "DOM.Iterable", "ESNext"],
    "target": "ES2015",
    "module": "commonjs",
    "jsx": "react",
    "noUnusedLocals": true,
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "isolatedModules": true,
    "forceConsistentCasingInFileNames": true,
    "downlevelIteration": true,
    "skipLibCheck": true,
    "rootDir": ".",
    "outDir": "dist",
    "declaration": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "noImplicitReturns": true
  },
  "include": ["src", "test", "features"]
}