Changes for CI tests

Author: joachimmetz

appveyor.yml

@@ -272,7 +272,7 @@ install:
 - ps: If (($env:BUILD_ENVIRONMENT -eq "msbuild") -And (Test-Path ".\synctestdata.ps1")) {
     .\synctestdata.ps1 }
 - sh: if ( test ${BUILD_ENVIRONMENT} = "python-tox" || test ${BUILD_ENVIRONMENT} = "xcode" ) && test -f "./synctestdata.sh"; then ./synctestdata.sh; fi
-- sh: if ( test `uname -s` = "Darwin" && test ${BUILD_ENVIRONMENT} = "python-tox" ) || test ${BUILD_ENVIRONMENT} = "xcode"; then brew update-reset && brew update -q; fi
+- sh: if ( test `uname -s` = "Darwin" && test ${BUILD_ENVIRONMENT} = "python-tox" ) || test ${BUILD_ENVIRONMENT} = "xcode"; then brew untap homebrew/homebrew-cask-versions && brew update -q; fi
 - sh: if ( test `uname -s` = "Darwin" && test ${BUILD_ENVIRONMENT} = "python-tox" ) || test ${BUILD_ENVIRONMENT} = "xcode"; then brew install -q autoconf automake gettext gnu-sed libtool pkg-config || true; fi
 - cmd: if [%BUILD_ENVIRONMENT%]==[python-tox] (
     "%PYTHON%" -m pip install -U tox twine )