[ANNOUNCE] CMake 3.18.6 available for download

[Tom Osika]

We are pleased to announce that CMake 3.18.6 is now available for download.

You can find the 3.18.6 release at:
  https://github.com/Kitware/CMake/releases/tag/v3.18.6

Thanks for your support!

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Changes made since CMake 3.18.5:

Ben Boeckel (1):
  FindPython2: avoid doubling the extension in CPython2 SOABI

Brad King (5):
  Ninja: Remove cleandead on regeneration
  ci: speed up cmake and ninja downloads on Windows
  ci: download WiX on Windows
  LexerParser: Do not override existing _POSIX_C_SOURCE definition
  CMake 3.18.6

Raul Tambre (1):
  CUDA: Fix user-set architectures during detection with Visual Studio