googletest: bump minimum CMake version to 3.5

Modern CMake versions give the following warning when building tests:

CMake Deprecation Warning at CMakeLists.txt:2 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

Signed-off-by: Stephan Lachnit <[email protected]>

cmake/googletest/CMakeLists.txt.in

@@ -1,5 +1,5 @@
 # from https://github.com/google/googletest/blob/master/googletest/README.md
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.5)
 
 project(googletest-download NONE)