tsconfig.json

{
  "compilerOptions": {
    "outDir": "./dist",
    "module": "esnext",
    "target": "es5",
    "lib": ["dom", "dom.iterable", "es2015.symbol", "es2017"],
    "importHelpers": true,
    "downlevelIteration": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "allowJs": false,
    "checkJs": false,
    "jsx": "react",
    "moduleResolution": "node",
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "removeComments": false,
    "noImplicitReturns": false,
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "suppressImplicitAnyIndexErrors": true,
    "pretty": true,
    "baseUrl": "./src",
    "strict": true,
    "strictNullChecks": false,
    "strictFunctionTypes": false
  },
  "include": ["./src/**/*"],
}