Workaround for the image size bug in IE (twbs#28855)

Author: ysds

scss/_card.scss

@@ -35,6 +35,9 @@
   // Enable `flex-grow: 1` for decks and groups so that card blocks take up
   // as much space as possible, ensuring footers are aligned to the bottom.
   flex: 1 1 auto;
+  // Workaround for the image size bug in IE
+  // See: https://github.com/twbs/bootstrap/pull/28855
+  min-height: 1px;
   padding: $card-spacer-x;
   color: $card-color;
 }