style: Add animation.

Author: jaywcjlove

core/src/dist.css

@@ -0,0 +1,27 @@
+.github-corner:hover .octo-arm {
+  animation: octocat-wave 560ms ease-in-out;
+}
+
+@keyframes octocat-wave {
+  0%,
+  100% {
+    transform: rotate(0);
+  }
+  20%,
+  60% {
+    transform: rotate(-25deg);
+  }
+  40%,
+  80% {
+    transform: rotate(10deg);
+  }
+}
+
+@media (max-width: 500px) {
+  .github-corner:hover .octo-arm {
+    animation: none;
+  }
+  .github-corner .octo-arm {
+    animation: octocat-wave 560ms ease-in-out;
+  }
+}

core/src/index.tsx

@@ -1,5 +1,6 @@
 import { defineComponent, h, PropType, ExtractPropTypes } from 'vue';
-import { StandardLonghandProperties, ZIndexProperty } from 'csstype';
+import { StandardLonghandProperties } from 'csstype';
+import './dist.css';
 
 export const gihubCorners = {
   /**