set cmake_minimum_required to 3.22 (#1069)

* set cmake_minimum_required to 3.22

That's the cmake verion included in Ubuntu 2022.04

Change-Id: I5d6da0d33c86eae5020bba1b9a8805fc8d7e7868

* CMake: assume CMP0091 OLD

Assume old-style setting of MSVC runtime selection.
See https://cmake.org/cmake/help/latest/policy/CMP0091.html

Set to OLD to allow migration of projects to the new mechanism.

Change-Id: I29f78d11e912924689f5508f1c2d6e72013d2563

CMakeLists.txt

@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required(VERSION 3.13)
+cmake_minimum_required(VERSION 3.22)
+cmake_policy(SET CMP0091 OLD) # Assume old-style selection of MSVC runtime
 if (POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW)
 endif()