don't use deprecated brew tap-pin

mbdevpl · mbdevpl · commit 852f34dc71d1 · 2019-12-07T15:18:04.000+09:00
instead refer to the full package name when installing fixes opencv#266 context: https://brew.sh/2019/04/04/homebrew-2.1.0/ Homebrew/brew#5925
diff --git a/travis_config.sh b/travis_config.sh
@@ -98,11 +98,10 @@ function pre_build {
 
     echo 'Installing QT4'
     brew tap | grep -qxF cartr/qt4 || brew tap cartr/qt4
-    brew tap --list-pinned | grep -qxF cartr/qt4 || brew tap-pin cartr/qt4
     if [ -n "$CACHE_STAGE" ]; then
-        brew_install_and_cache_within_time_limit qt@4 || { [ $? -gt 1 ] && return 2 || return 0; }
+        brew_install_and_cache_within_time_limit cartr/qt4/qt@4 || { [ $? -gt 1 ] && return 2 || return 0; }
     else
-        brew install qt@4
+        brew install cartr/qt4/qt@4
     fi
 
     echo 'Installing FFmpeg'
