libjsonutils cmake warning

I am not sure how to solve CMP0048 CMake warning, does anyone know how to solve this? See below:

/snap/clion/61/bin/cmake/linux/bin/cmake -DCMAKE_BUILD_TYPE= -G "CodeBlocks - Unix Makefiles" /home/jonb/Projects/cmake-test/modern-cmake-sample/libjsonutils
-- Boost version: 1.65.1
-- Found the following Boost libraries:
--   regex
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jonb/Projects/cmake-test/modern-cmake-sample/libjsonutils/googletest-download
[ 11%] Performing update step for 'googletest'
Current branch master is up to date.
[ 22%] No configure step for 'googletest'
[ 33%] No build step for 'googletest'
[ 44%] No install step for 'googletest'
[ 55%] No test step for 'googletest'
[ 66%] Completed 'googletest'
[100%] Built target googletest
CMake Warning (dev) at googletest-src/CMakeLists.txt:3 (project):
  Policy CMP0048 is not set: project() command manages VERSION variables.
  Run "cmake --help-policy CMP0048" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  The following variable(s) would be set to empty:

    PROJECT_VERSION
    PROJECT_VERSION_MAJOR
    PROJECT_VERSION_MINOR
    PROJECT_VERSION_PATCH
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Configuring done
-- Generating done
-- Build files have been written to: /home/jonb/Projects/cmake-test/modern-cmake-sample/libjsonutils

[Finished]

pabloariasal / modern-cmake-sample

libjsonutils cmake warning #10