tsconfig.json

{
  "compilerOptions": {
    "module": "ES6",
    "outDir": "./lib/esm",
    "moduleResolution": "node",
    "skipLibCheck": true,
    "importHelpers": false,
    "target": "es6",
    "removeComments": true,
    "strict": true,
    "resolveJsonModule": true,
    "allowSyntheticDefaultImports": true,
    "emitDecoratorMetadata": true,
    "declaration": true,
    "sourceMap": false,
    "inlineSourceMap": true,
    "preserveConstEnums": true,
    "noImplicitAny": true,
    "noEmitOnError": true,
    "noEmitHelpers": false,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "experimentalDecorators": true,
    "strictNullChecks": true,
    "pretty": true,
    "forceConsistentCasingInFileNames": true,
    "noUnusedLocals": true,
    "jsx": "react",
    "lib": ["es2017", "es2016", "dom"],
    "baseUrl": ".",
    "paths": {
      "*": ["src/*", "node_modules/*"]
    }
  },
  "exclude": ["lib", "node_modules", "**/*.spec.*"],
  "include": ["src/**/*"]
}