Cirrus ci apple silicon

Since we don't have any apple silicon devices of our own, and since building a universal binary for nheko from intel is a very non-trivial task... we'll use cirrus-ci's free tier to build for apple silicon for now.

.ci/macos/build.sh

@@ -19,8 +19,7 @@ cmake -GNinja -S. -Bbuild \
       -DHUNTER_ENABLED=ON -DBUILD_SHARED_LIBS=OFF \
       -DCMAKE_BUILD_TYPE=RelWithDebInfo -DHUNTER_CONFIGURATION_TYPES=RelWithDebInfo \
       -DUSE_BUNDLED_OPENSSL=ON \
-      -DCI_BUILD=ON \
-      -DCMAKE_OSX_DEPLOYMENT_TARGET=10.15
+      -DCI_BUILD=ON
 cmake --build build
 ( cd build || exit 
   git clone https://github.com/Nheko-Reborn/qt-jdenticon.git