tsconfig.json

{
  // "compileOnSave": true,
  "compilerOptions": {
    "incremental": true,
    "strict": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "alwaysStrict": true,
    "strictBindCallApply": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,

    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,

    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    // "noUnusedParameters": false,
    // "suppressExcessPropertyErrors": false,
    // "suppressImplicitAnyIndexErrors": false,

    "target": "es2017",
    "module": "commonjs",
    "moduleResolution": "node",
    "newLine": "LF",
    "noEmitOnError": true,
    "declaration": true,
    // "noImplicitAny": true,
    // "lib": ["dom", "es2018"],
    "lib": ["es2018"],
    // "outDir": "dist",
    // "rootDir": "src",
    // "typeRoots": ["src/types", "node_modules/@types"],

    "stripInternal": false,

    // "experimentalDecorators": true,
    "pretty": true
  },
  "exclude": [
    "node_modules",
    "**/__tests__/*",
  ]
}