增加基本项目配置

node_modules/animate.css/source/bouncing_exits/bounceOutDown.css

@@ -0,0 +1,20 @@
+@keyframes bounceOutDown {
+  20% {
+    transform: translate3d(0, 10px, 0);
+  }
+
+  40%,
+  45% {
+    opacity: 1;
+    transform: translate3d(0, -20px, 0);
+  }
+
+  to {
+    opacity: 0;
+    transform: translate3d(0, 2000px, 0);
+  }
+}
+
+.bounceOutDown {
+  animation-name: bounceOutDown;
+}