SDL_mixer: bumped cmake minimum version from 2.8.11 to 2.8.12 in some project files

SDL Commits
1 
From 4d2fec78b8deca24ce6c7f7a9e3725cf31f75896 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 18 Apr 2021 20:22:24 +0300
Subject: [PATCH] bumped cmake minimum version from 2.8.11 to 2.8.12 in some
 project files

---
 CMakeLists.txt                              | 2 +-
 external/libogg-1.3.2/CMakeLists.txt        | 2 +-
 external/libvorbisidec-1.2.1/CMakeLists.txt | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 09e7045..54f8397 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.11)
+cmake_minimum_required(VERSION 2.8.12)
 project(SDL_mixer C)
 
 
diff --git a/external/libogg-1.3.2/CMakeLists.txt b/external/libogg-1.3.2/CMakeLists.txt
index e47f1a1..08abca4 100644
--- a/external/libogg-1.3.2/CMakeLists.txt
+++ b/external/libogg-1.3.2/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.11)
+cmake_minimum_required(VERSION 2.8.12)
 project(libogg C)
 
 include(${CMAKE_CURRENT_SOURCE_DIR}/../audio_codec_common.cmake)
diff --git a/external/libvorbisidec-1.2.1/CMakeLists.txt b/external/libvorbisidec-1.2.1/CMakeLists.txt
index 0608ee3..b6a9686 100644
--- a/external/libvorbisidec-1.2.1/CMakeLists.txt
+++ b/external/libvorbisidec-1.2.1/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.11)
+cmake_minimum_required(VERSION 2.8.12)
 project(libvorbisidec C)
 
 include(${CMAKE_CURRENT_SOURCE_DIR}/../audio_codec_common.cmake)