Update Qt on Mac to 5.12.10, for better compatibility with Big Sur

Note that this makes the earliest supported version of macOS
to be 10.12 (Sierra), and drops support for Yosemite and El Capitan.

Author: softins

autobuild/mac/artifacts/autobuild_mac_1_prepare.sh

@@ -8,10 +8,10 @@
 
 echo "Install dependencies..."
 python3 -m pip install aqtinstall
-python3 -m aqt install --outputdir /usr/local/opt/qt 5.9.9 mac desktop
+python3 -m aqt install --outputdir /usr/local/opt/qt 5.12.10 mac desktop
 
 # add the qt binaries to the path
-export -p PATH=/usr/local/opt/qt/5.9.9/clang_64/bin:"${PATH}"
+export -p PATH=/usr/local/opt/qt/5.12.10/clang_64/bin:"${PATH}"
 echo "::set-env name=PATH::${PATH}"
 echo "the path is ${PATH}"
 

autobuild/mac/codeQL/autobuild_mac_1_prepare.sh

@@ -8,10 +8,10 @@
 
 echo "Install dependencies..."
 python3 -m pip install aqtinstall
-python3 -m aqt install --outputdir /usr/local/opt/qt 5.9.9 mac desktop
+python3 -m aqt install --outputdir /usr/local/opt/qt 5.12.10 mac desktop
 
 # add the qt binaries to the path
-export -p PATH=/usr/local/opt/qt/5.9.9/clang_64/bin:"${PATH}"
+export -p PATH=/usr/local/opt/qt/5.12.10/clang_64/bin:"${PATH}"
 echo "::set-env name=PATH::${PATH}"
 echo "the path is ${PATH}"