feat: add fadeIn animation

Author: streamich

addon/animate/fadeIn.js

@@ -0,0 +1,22 @@
+'use strict';
+
+exports.addon = function (renderer) {
+    if (process.env.NODE_ENV !== 'production') {
+        require('../__dev__/warnOnMissingDependencies')('animate', renderer, ['keyframes']);
+    }
+
+    renderer.put('', {
+        '@keyframes fadeIn': {
+            from: {
+                opacity: 0,
+            },
+            to: {
+                opacity: 1,
+            }
+        },
+
+        '.fadeIn': {
+            animationName: 'fadeIn',
+        }
+    });
+};