tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es2018",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "lib": ["es2017"],                             /* Specify library files to be included in the compilation:  */    
    "strict": false,
    "noImplicitAny": false,
    "outDir": "./dest",                        /* Redirect output structure to the directory. */
    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */    
    "typeRoots": [
        "./node_modules/@types",
    ],                       /* List of folders to include type definitions from. */    
    "declaration": true,

    /* Experimental Options */
    "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
    //"strictPropertyInitialization": false,
    "noStrictGenericChecks": true
  },
  "include": [
    "src/**/*"
  ]
}