Merge branch 'stable-1.2'

# Conflicts:
#	.travis/linux..before_install.sh
#	.travis/linux..install.sh
#	.travis/linux..script.sh
#	cmake/linux/package_linux.sh.in
#	include/AudioWeakJack.def
#	plugins/vst_base/CMakeLists.txt
#	plugins/zynaddsubfx/zynaddsubfx

.travis/linux..script.sh

@@ -2,7 +2,7 @@
 if [ "$QT5" ]; then
 	unset QTDIR QT_PLUGIN_PATH LD_LIBRARY_PATH
 	# shellcheck disable=SC1091
-	source /opt/qt58/bin/qt58-env.sh
+	source /opt/qt59/bin/qt59-env.sh
 fi
 
 set -e