jansson: update to 2.15.0

Changelog:
https://github.com/akheron/jansson/blob/v2.15.0/CHANGES

Remove upstreamed patch:
001-cmake-ver.patch

Link: https://github.com/openwrt/openwrt/pull/21908
Signed-off-by: Nick Hainke <vincent@systemli.org>

package/libs/jansson/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=jansson
-PKG_VERSION:=2.14.1
+PKG_VERSION:=2.15.0
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/akheron/$(PKG_NAME)/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=979210eaffdffbcf54cfc34d047fccde13f21b529a381df26db871d886f729a4
+PKG_HASH:=73ac12bbc62ff536e40c7a3e15ed007993c5ca4d23897de23f1906f891b5a4bb
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE

package/libs/jansson/patches/001-cmake-ver.patch

@@ -1,8 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -1,4 +1,4 @@
--cmake_minimum_required (VERSION 3.1)
-+cmake_minimum_required (VERSION 3.10)
- project(jansson C)
- 
- # Options