tsconfig.json

{
  "include": [
    "src",
    "types"
  ],
  "exclude": [
    "/node_modules/",
    "./src/**/*.spec.ts"
  ],
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "baseUrl": "./",
    "declaration": true,
    "esModuleInterop": true,
    "lib": [
      "es2015",
      "es2016",
      "es2017",
      "dom"
    ],
    "module": "commonjs",
    "moduleResolution": "node",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "downlevelIteration": true,
    "outDir": "dist",
    "rootDir": "src",
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "target": "es6",
    "paths": {
      "*": [
        "src/*"
      ]
    }
  },
  "typeAcquisition": {
    "include": [
      "jest"
    ]
  }
}