Bump CMake Minimum Requirement in `master` to be inline with/exceed Qt 6.6+ macOS Requirements

[xavier2k6]

qBittorrent & operating system versions

qBittorrent: master

What is the problem?

Currently CMake 3.16 is Min. Req. https://github.com/qbittorrent/qBittorrent/blob/7786e1b084c5534f757cd762f328b0ed242f5375/CMakeLists.txt#L1

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(As of Qt 6.6) - The minimum CMake version for Qt on Apple platforms is now CMake 3.21.1.

Bump CMake requirements on Apple platforms The minimum CMake version for Qt on Apple platforms is now 3.21.1.

https://code.qt.io/cgit/qt/qtreleasenotes.git/about/qt/6.6.0/release-note.md

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CMake (>= 3.16, >= 3.18.4 for Ninja Multi-Config, >= 3.19 for WebEngine, >= 3.21.1 for static Qt builds in Qt 6.2+, or builds for Apple platforms in Qt 6.6+)

https://wiki.qt.io/Building_Qt_6_from_Git

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CMake (>=3.16, >= 3.18.4 for Ninja Multi-Config, >= 3.21.1 for static Qt builds or building for Apple platforms)

https://doc.qt.io/qt-6/macos-building.html

Steps to reproduce

No response

Additional context

• Bump CMake to 3.21.1+ (Default/min. on our CI - Linux (Ubuntu 22.04 - CMake 3.22.1)

https://repology.org/project/cmake/badges https://www.scivision.dev/cmake-changelog/

Log(s) & preferences file(s)

No response

[xavier2k6]

@qbittorrent/bug-handlers Thoughts? - Is there anything else required other than just bumping the minimum version?