Catch the finished promise AbortError and rethrow any error that isn'…

…t an AbortError

src/transition.js

@@ -79,5 +79,13 @@ function nextFrame() {
 }
 
 function afterTransition(element) {
-  return Promise.all(element.getAnimations().map(animation => animation.finished))
+  return Promise.all(
+    element.getAnimations().map(animation => {
+      return animation.finished.catch(e => {
+        if (e.name !== 'AbortError') {
+          throw e
+        }
+      })
+    }),
+  )
 }