tsconfig.json

{
  "compilerOptions": {  
    "outDir": "./dist",
    "rootDir": "src",  
    "target": "esnext",
    "module": "nodenext",
    "allowJs": true,
    "declaration": true,
    "sourceMap": true,
    "removeComments": true,
    "importHelpers": true,
    "forceConsistentCasingInFileNames": true,

    "strictFunctionTypes": true,
    "strictBindCallApply": true,
    "strictPropertyInitialization": false,
    "strictNullChecks": false,

    "experimentalDecorators": true, //if we use std generators, we need the metadata to be emited!
    "emitDecoratorMetadata": false,
    "useDefineForClassFields": false, //we need this false, unless we use accessor keyword! 

    "noImplicitThis": true,
    "alwaysStrict": true,
    "resolveJsonModule": true,
    "noUnusedLocals": false,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
 
    "moduleResolution": "nodenext",
    "esModuleInterop": true,
    "skipLibCheck": true
  },
  "include": [
    "./src/**/*"
  ]
}