nghttp3: update to 1.2.0

* update PKG_RELEASE to be apk-compatible
* update PKG_SOURCE/PKG_SOURCE_URL so that it builds

Signed-off-by: Stan Grishin <stangri@melmac.ca>

libs/nghttp3/Makefile

@@ -1,12 +1,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nghttp3
-PKG_VERSION:=1.1.0
-PKG_RELEASE:=1
+PKG_VERSION:=1.2.0
+PKG_RELEASE:=r1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=https://codeload.github.com/ngtcp2/nghttp3/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=b3ffb23a90442a0eafe8bfbefbc8b4ffb5179d68a7c0b8a416a34cf04b28d7c5
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_URL:=https://github.com/ngtcp2/$(PKG_NAME)/releases/download/v$(PKG_VERSION)/
+PKG_HASH:=d2e216bae7bd7362f850922e4237a5caa204853b3594b22adccab4c1e1c1d1aa
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=COPYING