kcptun: bump to v20210922

Signed-off-by: Chao Liu <git@expiron.dev>

net/kcptun/Makefile

@@ -1,13 +1,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=kcptun
-PKG_VERSION:=20201010
-PKG_RELEASE:=2
+PKG_VERSION:=20210922
+PKG_RELEASE:=$(AUTORELEASE)
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/xtaci/kcptun/tar.gz/v${PKG_VERSION}?
-PKG_SOURCE_DATE:=2020-10-10
-PKG_HASH:=afab2a087b787e59e129c7d4fbc578e1131d264c0da1ce23cd1282321fc3c189
+PKG_SOURCE_DATE:=2021-09-22
+PKG_HASH:=f6a08f0fe75fa85d15f9c0c28182c69a5ad909229b4c230a8cbe38f91ba2d038
 
 PKG_MAINTAINER:=Dengfeng Liu <liudf0716@gmail.com>, Chao Liu <expiron18@gmail.com>
 PKG_LICENSE:=MIT