CMake: Version compatibility fixes 2

[cjee21]

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[cjee21]

@JeromeMartinez Actually the ZenLib CMake project still supports CMake 3.1. It can be configured by both CMake 3.1 and 4.x without any version warnings. Instead of bumping minimum to 3.5 previously, just adding a max supported version like we have now is enough to remove any warnings and errors in newer CMake.

[JeromeMartinez]

Even RHEL 7 has CMake 3.6 and we don't support it anymore.Our oldest supported platform is RHEL 8 and it has CMake 3.11 minimum, and updated RHEL 8.4 has CMake 3.18+.So actually I could afford a higher CMake version.For me minimum of 3.5 is totally fine, I suggest to keep it (or 3.8?) if there is no strong need/wish of it on your side.

[cjee21]

For me minimum of 3.5 is totally fine, I suggest to keep it (or 3.8?) if there is no strong need/wish of it on your side.

Let's keep it then. I don't really use the CMake (mainly just for developing the official Android app and if I ever need to self build on Linux) and when I do I always use latest pre-installed by build tools which is very new.