Can't pull to refresh when swipe down on non-scrollable objects

**Describe the bug**
The swipe refresh only works for a scrollable object like ListView, SingleChildScrollView. And if "swipe down" performed on a non-scrollable object (Container, Text), the LiquidPullToRefresh not worked.

**To Reproduce**
Steps to reproduce the behavior:
1. Use this code: https://gist.github.com/IkhwanSI13/c38089a2ef6853b837e10a5988ec6475
2. Run the code
3. Swipe down at Container Text

**Expected behavior**
the onRefresh function of LiquidPullToRefresh runs when swiping down at Container Text.

**Flutter:**
- version: 1.22.6
- channel: stable

**Dart:**
- version: 2.10.5

**Additional context**
- liquid_pull_to_refresh: ^2.0.0