tsconfig.json

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "baseUrl": ".",
    "declaration": true,
    "declarationDir": "lib/types",
    "esModuleInterop": true,
    "importHelpers": true,
    "lib": [
      "es2017",
      "es2019"
    ],
    "module": "CommonJS",
    "moduleResolution": "Node",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": false,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "outDir": "lib",
    "paths": {
      "*": [
        "*"
      ]
    },
    "resolveJsonModule": true,
    "sourceMap": true,
    "strict": true,
    "strictNullChecks": true,
    "target": "ESNext"
  },
  "exclude": [
    "node_modules",
    "lib",
    "./src/**/*.spec.ts"
  ],
  "include": [
    "**/*.ts"
  ],
  "typeRoots": [
    "../node_modules/@types"
  ]
}