Added IntelCC as public generator (conan-io#9747)

* Added IntelCC as public generator

* Added a couple of IntelCC tests

Check old cacert.pem before deleting when updating Conan (conan-io#9734)

* new cacert migration

* fix for py27

Added migration (conan-io#9697)

Merge pull request conan-io#9643 from czoido/add_support-for-xcode-13

Add support for Xcode 13

release 1.40.1

adding new confs (conan-io#9526)

branched release 1.39

fixing cmaketoolchain cross for Android (conan-io#9186)

version 1.37.2

fixing preprocessor_definitions in MSBuildToolchain (conan-io#9056)