Update version to v4.1.0

sugyan · sugyan · commit 11646a60b9ae · 2018-11-28T13:45:51.000+09:00
diff --git a/linebot/version.go b/linebot/version.go
@@ -16,4 +16,4 @@
 
 package linebot
 
-const version = "4.0.0"
+const version = "4.1.0"
