Merge pull request #88 from pepabo/fix-dialog-keyframes

dialogはexportだけでなくstyleのmixinでもkeyframesを適用する

Author: itoh4126

packages/dialog/_mixins.scss

@@ -31,6 +31,7 @@
   @include -size-style(map.get($options, size));
   @include -alignment-style(map.get($options, alignment));
   @include -button-flow-style(map.get($options, button-flow));
+  @include keyframes;
 
   > * {
     grid-column: 2;