remix-project/libs/remix-lib/tsconfig.lib.json

{
    "extends": "../../tsconfig.json",
    "compilerOptions": {
      "module": "commonjs",
      "outDir": "../../dist/out-tsc",
      "allowJs": true,
      "declaration": true,
      "rootDir": "./",
      "types": ["node"]
    },
    "exclude": ["**/*.spec.js"],
    "include": [
      "src/**/*.js",
      "./index.js"
    ]
  }