tsconfig.json

{
  "compilerOptions": {
    "alwaysStrict": true,

    "incremental": true,

    "target": "ES2020",
    "module": "ES2020",
    "lib": ["ESNext"],

    "esModuleInterop": true,
    "isolatedModules": false,

    "skipLibCheck": true,

    "noEmitOnError": true,
    "noUnusedParameters": true,

    "strict": true,
    "noImplicitAny": true,
    "noUnusedLocals": true,
    "strictNullChecks": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "forceConsistentCasingInFileNames": true,
    "allowJs": false,

    "removeComments": false,
    "preserveConstEnums": true,

    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,

    "declaration": true,
    "declarationMap": true,
    "diagnostics": true,
    "pretty": true,
    "sourceMap": true,

    "outDir": "./lib"
  },
  "compileOnSave": true,
  "include": [
      "src/*.ts"
  ],
  "exclude": [
      "node_modules"
  ]
}