Add support for apple-clang 12 (conan-io#7722)

* add xcode 12

* fix default settings

version 1.29.1

Merge pull request conan-io#7638 from czoido/revert/7586

Revert changes from PR 7586

Fix filename in FindPackageHandleStandardArgs for cmake_find_package …

…generator (conan-io#7625)

* Fix filename in FindPackageHandleStandardArgs for cmake_find_package generator

* fix test

* use filename for version variable as well

* all

Co-authored-by: danimtb <[email protected]>

fix test (conan-io#7516)

Hotfix/lockfile errors (conan-io#7453)

* improve error msgs

* better error msgs

* minor fixes to error msgs and better checks

bump version to 1.27.1

update to 1.27.0

update version to 1.26.1

update migrations settings