Merge pull request #507 from martin-frbg/xcode122

[WIP,Testing] Add Travis CI job for OS X Catalina to investigate CBLAS test errors

Author: langou

.travis.yml

@@ -30,6 +30,10 @@ matrix:
     name: "CMake Release Test on Mac OS X"
     osx_image: xcode10.3
     env: CMAKE_BUILD_TYPE=Release
+  - os: osx
+    name: "CMake Release Test on OSX Catalina"
+    osx_image: xcode12.2
+    env: CMAKE_BUILD_TYPE=Release
   - os: osx
     osx_image: xcode10.3
     name: "Makefile Test on Mac OS X"