tsconfig.json

{
  "compilerOptions": {
    "outDir": "./build",
    "typeRoots": [
      "node_modules/@types",
      "src/typings"
    ],
    "target": "es2015",
    "module": "commonjs",
    "lib": [
      "es2017",
      "esnext",
      "esnext.asynciterable"
    ],
    "downlevelIteration": true,
    "resolveJsonModule": true,
    "allowJs": true,
    "sourceMap": false,
    "strict": true,
    "noImplicitAny": false,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "skipLibCheck": true
  },
  "include": [
    "*",
    "lib/*"
  ],
  "exclude": [
    "build/**/*",
    "node_modules/**/*"
  ]
}