tsconfig.json

{
  "compilerOptions": {
      /* Basic Options */
      "target": "es2016",
      "module": "commonjs",
      "lib": ["es2015", "es2016"],
      "allowJs": false,
      "declaration": true,
      "sourceMap": true,
      "outDir": "./dist",
      "stripInternal": true,

      /* Strict Type-Checking Options */
      "strict": true,                           /* Enable all strict type-checking options. */
      "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
      "noImplicitThis": true,                   /* Raise error on 'this' expressions with an implied 'any' type. */
      "alwaysStrict": true,                     /* Parse in strict mode and emit "use strict" for each source file. */

      /* Additional Checks */
      "forceConsistentCasingInFileNames": true,
      "noUnusedLocals": true,                   /* Report errors on unused locals. */
      "noUnusedParameters": true,               /* Report errors on unused parameters. */
      "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
      "noFallthroughCasesInSwitch": true,       /* Report errors for fallthrough cases in switch statement. */

      "typeRoots": [                            /* List of folders to include type definitions from. */
          "./node_modules/@types",
          "./src/@types"
      ],
      "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
  },
  "include": [
      "./src/**/*"
  ],
  "compileOnSave": true
}