tsconfig.json

{
  "compilerOptions": {
    "baseUrl": ".",
    "target": "es2017",
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "declaration": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "module": "esnext",
    "outDir": "./build",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "removeComments": true,
    "experimentalDecorators": true,
    "strictPropertyInitialization": false,
    "emitDecoratorMetadata": true,
  },
  "exclude": [
    "node_modules"
  ],
  "include": [
    "./src/**/*.ts",
  ],
  "ts-node": {
      "transpileOnly": true, // you can specify ts-node options here
      "compilerOptions": {
        "module": "commonjs" // you can also override compilerOptions.  Only ts-node will use these overrides
      }
  },
}