Update .travis.yml

removed verbose tests

Former-commit-id: e13f25477ea07ed146c689beebcb638bdc905ab6

.travis.yml

@@ -70,5 +70,5 @@ script:
 - cd build
 - cmake -DCMAKE_BUILD_TYPE=$CONFIG -DLIBIGL_BUILD_TESTS=ON -DLIBIGL_BUILD_TUTORIALS=ON ../
 - make -j 2
-- ctest --verbose
+- make test
 - ccache --show-stats