tsconfig.json

{
  "$schema": "http://json.schemastore.org/tsconfig",
  "compilerOptions": {
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "noImplicitAny": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitThis": false,
    "noEmitOnError": true,
    "strictNullChecks": true,
    "resolveJsonModule": true,
    "strict": true,
    "alwaysStrict": true,
    "strictPropertyInitialization": true,
    "esModuleInterop": true,

    "rootDir": ".",
    "module": "commonjs", // Use commonjs for compatibility
    "moduleResolution": "node",
    "target": "es2019",
    "outDir": "dist", // The javascript will be compiled to this folder.
    "sourceMap": true,
    "declaration": true, // To share typescript across modules, Typescript will then also export type definitions together with the compiled javascript code so the package can be used with both Typescript and Javascript.
    "downlevelIteration" : true
  },
  "include": ["src", "test", "index.ts"], //All source files in the src folder
  "exclude": ["node_modules/**", "**/*.d.ts"]
}