Update events.md (#661)

heiye9 · Justineo · commit f709ff1ce3a5 · 2018-02-02T12:02:09.000+08:00
diff --git a/src/v2/guide/events.md b/src/v2/guide/events.md
@@ -318,7 +318,7 @@ Vue.config.keyCodes.f1 = 112
 
 ### 鼠标按钮修饰符
 
-> 2.1.0 新增
+> 2.2.0 新增
 
 - `.left`
 - `.right`
