Use new brew package name syntax

.travis/osx..script.sh

@@ -4,7 +4,7 @@ set -e
 
 if [ "$QT5" ]; then
         # Workaround; No FindQt5.cmake module exists
-        CMAKE_PREFIX_PATH="$(brew --prefix qt55)"
+        CMAKE_PREFIX_PATH="$(brew --prefix qt@5.5)"
         export CMAKE_PREFIX_PATH
 fi
 

cmake/apple/install_apple.sh.in

@@ -24,10 +24,10 @@ echo -e "$MSG_COLOR\n\nCreating App Bundle \"$APP\"...$COLOR_RESET"
 # Locate macdeployqt, assume homebrew & Qt5
 which macdeployqt > /dev/null 2>&1
 if [ $? -ne 0 ]; then
-  brew --prefix qt55 > /dev/null 2>&1
+  brew --prefix qt@5.5 > /dev/null 2>&1
   if [ $? -eq 0 ]; then
     # Prefer Qt 5.5 (QTBUG-53533)
-    PATH=$PATH:$(brew --prefix qt55)/bin
+    PATH=$PATH:$(brew --prefix qt@5.5)/bin
   else
     # Fallback Qt 5.6+
   	PATH=$PATH:$(brew --prefix qt5)/bin