fix(VSnackbar): close from swipe gesture

fixes #3509

packages/vuetify/src/components/VSnackbar/VSnackbar.tsx

@@ -107,6 +107,7 @@ export const VSnackbar = genericComponent<VSnackbarSlots>()({
     const overlay = ref<VOverlay>()
     const timerRef = ref<VProgressLinear>()
     const isHovering = shallowRef(false)
+    const startY = shallowRef(0)
 
     watch(isActive, startTimeout)
     watch(() => props.timeout, startTimeout)
@@ -147,6 +148,16 @@ export const VSnackbar = genericComponent<VSnackbarSlots>()({
       startTimeout()
     }
 
+    function onTouchstart (event: TouchEvent) {
+      startY.value = event.touches[0].clientY
+    }
+
+    function onTouchend (event: TouchEvent) {
+      if (Math.abs(startY.value - event.changedTouches[0].clientY) > 50) {
+        isActive.value = false
+      }
+    }
+
     const locationClasses = computed(() => {
       return props.location.split(' ').reduce((acc, loc) => {
         acc[`v-snackbar--${loc}`] = true
@@ -199,6 +210,8 @@ export const VSnackbar = genericComponent<VSnackbarSlots>()({
           scrim={ false }
           scrollStrategy="none"
           _disableGlobalStack
+          onTouchstart={ onTouchstart }
+          onTouchend={ onTouchend }
           { ...scopeId }
           v-slots={{ activator: slots.activator }}
         >