tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    "outDir": "dist",
    "rootDir": "src",
    "moduleResolution": "node",
    "module": "commonjs",
    "declaration": true,
    "importHelpers": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "sourceMap": true,
    "listFiles": false,
    "traceResolution": false,
    "pretty": true,

    "strictNullChecks": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny" : true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noUnusedLocals": false,
    "noUnusedParameters": false,

    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "es6",
      "dom",
      "dom.iterable",
    ]
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules/**"
  ],
  "compileOnSave": false
}