Update chuckle to be similar to Wechat emoji

Author: MolotovCherry

src/main/java/com/oasisfeng/nevo/decorators/wechat/EmojiMap.java

@@ -44,7 +44,7 @@ class EmojiMap {
 			{ "惊讶",		"Surprise",		"😲" },
 			{ "难过",		"Frown",		"🙁" },
 			{ "抓狂",		"Scream",		"😫" },
-			{ "偷笑",		"Chuckle",		"😅" },
+			{ "偷笑",		"Chuckle",		"🤭" },
 			{ "愉快",		"Joyful",		"☺" },
 			{ "白眼",		"Slight",		"🙄" },
 			{ "傲慢",		"Smug",			"😕" },