Update docs for v1.16.x branch

Also update the minimum required CMake version
https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md

PiperOrigin-RevId: 724375734
Change-Id: Iefa6c7e2061457bc6149a280d2408085b1fb9d11

Author: derekmauro

CMakeLists.txt

@@ -1,10 +1,10 @@
 # Note: CMake support is community-based. The maintainers do not use CMake
 # internally.
 
-cmake_minimum_required(VERSION 3.13)
+cmake_minimum_required(VERSION 3.16)
 
 project(googletest-distribution)
-set(GOOGLETEST_VERSION 1.15.2)
+set(GOOGLETEST_VERSION 1.16.0)
 
 if(NOT CYGWIN AND NOT MSYS AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL QNX)
   set(CMAKE_CXX_EXTENSIONS OFF)

README.md

@@ -9,20 +9,23 @@ GoogleTest now follows the
 We recommend
 [updating to the latest commit in the `main` branch as often as possible](https://github.com/abseil/abseil-cpp/blob/master/FAQ.md#what-is-live-at-head-and-how-do-i-do-it).
 We do publish occasional semantic versions, tagged with
-`v${major}.${minor}.${patch}` (e.g. `v1.15.2`).
+`v${major}.${minor}.${patch}` (e.g. `v1.16.0`).
 
 #### Documentation Updates
 
 Our documentation is now live on GitHub Pages at
 https://google.github.io/googletest/. We recommend browsing the documentation on
 GitHub Pages rather than directly in the repository.
 
-#### Release 1.15.2
+#### Release 1.16.0
 
-[Release 1.15.2](https://github.com/google/googletest/releases/tag/v1.15.2) is
+[Release 1.16.0](https://github.com/google/googletest/releases/tag/v1.16.0) is
 now available.
 
-The 1.15.x branch requires at least C++14.
+The 1.16.x branch requires at least C++14.
+
+The 1.16.x branch will be the last to support C++14. Future development will
+[require at least C++17](https://opensource.google/documentation/policies/cplusplus-support#c_language_standard).
 
 #### Continuous Integration
 

googletest/README.md

@@ -25,7 +25,7 @@ When building GoogleTest as a standalone project, the typical workflow starts
 with
 
 ```
-git clone https://github.com/google/googletest.git -b v1.15.2
+git clone https://github.com/google/googletest.git -b v1.16.0
 cd googletest        # Main directory of the cloned repository.
 mkdir build          # Create a directory to hold the build output.
 cd build