Require CMake version 3.6 or higher
CMakeLists.txt says:
cmake_minimum_required(VERSION 3.6)
which was updated in commit 9ecbd5007753b9c1f17a61a666a995e1156f13ff.
Change-Id: I6a14abf29689a020a28c548eed3228aaf8ad78ee
diff --git a/README.md b/README.md
index c4e7e6c..21b114e 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
### Prerequisites {#prerequisites}
- 1. [CMake](https://cmake.org) version 3.5 or higher.
+ 1. [CMake](https://cmake.org) version 3.6 or higher.
2. [Git](https://git-scm.com/).
3. [Perl](https://www.perl.org/).
4. For x86 targets, [yasm](http://yasm.tortall.net/), which is preferred, or a
