Exception null pointer

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i use your library in 2 project, one in androidx and one in support library
it's work well in androidx, but in support library i got this exception when touch in dimmed area,
```
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.mancj.slideup.VerticalTouchConsumer.consumeBottomToTop(android.view.View, android.view.MotionEvent)' on a null object reference
at com.mancj.slideup.SlideUp.onTouch(SlideUp.java:538)
```
is the problem in my layout or theres something else ? please give me a suggestion

```java
private SlideUp dialog() {
slideUp = new SlideUpBuilder(mDialog)
.withListeners(new SlideUp.Listener.Events() {
@Override
public void onSlide(float percent) {
DIM.setAlpha(1 - (percent / 100));
}

@Override
public void onVisibilityChanged(int visibility) {
if (visibility== View.VISIBLE) {
buttonAction.setVisibility(View.INVISIBLE);
} else {
buttonAction.setVisibility(View.VISIBLE);
}
}
})
.withStartGravity(Gravity.BOTTOM)
.withGesturesEnabled(true)
.withStartState(SlideUp.State.SHOWED)
.build();
return slideUp;
}
```

Start by reproducing the support-library case described in the issue, touching the dimmed area with gestures enabled, then inspect SlideUp.java at line 538 and the SlideUpBuilder setup shown. Confirm the cause using the reported stack trace; done means the same interaction no longer produces a NullPointerException.

Written by the indexing model from the issue text.