tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "declaration": true,
    "disableSizeLimit": true,
    "downlevelIteration": true,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "incremental": true,
    "inlineSourceMap": true,
    "jsx": "react-jsx",
    "lib": ["dom", "dom.iterable", "esnext"],
    "listEmittedFiles": false /* Print names of generated files part of the compilation. */,
    "listFiles": false /* Print names of files part of the compilation. */,
    "module": "commonjs",
    "moduleResolution": "node",
    "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
    "noImplicitAny": true,
    "noImplicitReturns": false,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true /* Report errors on unused parameters. */,
    "outDir": "./lib/",
    "pretty": true /* Stylize errors and messages using color and context. */,

    "resolveJsonModule": true,
    "skipLibCheck": true,
    "strict": true,
    "strictNullChecks": true,
    "target": "esnext",

    "traceResolution": false /* Report module resolution log messages. */,
    "types": ["node", "jest"]
  },
  "exclude": ["node_modules", "src/__sandbox/**/*", "src/__sandbox__/**/*"],
  "include": ["./src/**/*"]
}