Trying to return support for legacy Mac OS X version. [skip appveyor]

.travis.yml

@@ -28,7 +28,14 @@ jobs:
     compiler: clang
     env:
     - DEPLOY=true
+    - LEGACY=false
     osx_image: xcode11
+  - os: osx
+    compiler: clang
+    env:
+    - DEPLOY=true
+    - LEGACY=true
+    osx_image: xcode7.3
 before_install:
 - |
   if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
@@ -51,7 +58,12 @@ before_install:
     sudo dpkg -i ccache_3.3.4-1_amd64.deb;
   else
     brew update > /dev/null;
-    brew install qt5;
+    if [[ "$LEGACY" = false ]]; then
+      brew install qt5;
+    else
+      unset SSL_CERT_FILE;
+      brew install https://gist.githubusercontent.com/dismine/c3ac01de38e12edcf22d9e05791adf82/raw/8e2743e6382fefaabfa37da00633ff801477b53c/qt5.rb;
+    fi
     chmod -R 755 /usr/local/opt/qt5/*
   fi
 before_script:
@@ -102,7 +114,11 @@ before_deploy:
 - |
   if [[ "$DEPLOY" == "true" ]]; then
     ../scripts/macfixqtdylibrpath.py $TRAVIS_BUILD_DIR/build/src/app/valentina/bin/Valentina.app;
-    tar -C $TRAVIS_BUILD_DIR/build/src/app/valentina/bin --exclude "*.DS_Store" -cvzf valentina-osx-${TRAVIS_COMMIT}.tar.gz Valentina.app/;
+    if [[ "$LEGACY" = false ]]; then
+      tar -C $TRAVIS_BUILD_DIR/build/src/app/valentina/bin --exclude "*.DS_Store" -cvzf valentina-osx-${TRAVIS_COMMIT}.tar.gz Valentina.app/;
+    else
+      tar -C $TRAVIS_BUILD_DIR/build/src/app/valentina/bin --exclude "*.DS_Store" -cvzf valentina-osx-${TRAVIS_COMMIT}-legacy.tar.gz Valentina.app/;
+    fi
   fi
 deploy:
   provider: bintray