tsconfig.json

{
  "compilerOptions": {
    "outDir": "dist",
    "rootDir": "src",
    "baseUrl": ".",
    "module": "commonjs",
    "target": "es5",
    "lib": ["es7", "dom"],
    "jsx": "react",
    "allowSyntheticDefaultImports": true,
    "composite": true,
    "declaration": true,
    "declarationMap": true,
    "downlevelIteration": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "preserveSymlinks": true,
    "resolveJsonModule": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true
  },
  "include": ["./src/**/*"]
}