tsconfig.json

{
    "files": ["src/scripts/index.ts"],
    "compilerOptions": {
      "target": "es6",
      "module": "commonjs",
      "moduleResolution": "node",
      "sourceMap": true,
      "declaration": true,
      "strict": true,
      "removeComments": true,
      "noImplicitAny": true,
      "strictNullChecks": true,
      "strictFunctionTypes": true,
      "noUnusedLocals": true,
      "noUnusedParameters": true,
      "noImplicitReturns": true,
      "noFallthroughCasesInSwitch": true,
      "importHelpers": true,
      "skipLibCheck": true,
      "esModuleInterop": true,
      "allowSyntheticDefaultImports": true,
      "experimentalDecorators": true,
      "outDir": "./dist/tsc/",
      "types": [
        "node",
        "jest"
      ],
      "typeRoots": [
        "./node_modules/@types",
      ],
      "lib": [
        "es2016",
        "DOM"
      ]
    },
    "include": [
      "src/**/*.ts"
    ],
    "exclude": [
      "node_modules",
      "**/*.test.ts"
    ]
}