Eforce ESlint rules

- Turn on following lint rules and fix the code:

```javascript
      'no-underscore-dangle': 'off',
      'import/prefer-default-export': 'off',
      '@typescript-eslint/no-explicit-any': 'off',
      'import/no-cycle' : 'off',
      'arrow-body-style' : 'off',
      'jest/unbound-method': 'off',
```