test build new version of scipy

Author: rflamary

.travis.yml

@@ -33,7 +33,7 @@ before_install:
 # command to install dependencies
 install:
   - pip install -r requirements.txt
-  - pip install -U "numpy>=1.14" "scipy<1.3"  # for numpy array formatting in doctests + scipy version: otherwise, pymanopt fails, cf <https://github.com/pymanopt/pymanopt/issues/77>
+  - pip install -U "numpy>=1.14" scipy  # for numpy array formatting in doctests
   - pip install flake8 pytest "pytest-cov<2.6"
   - pip install -U "sklearn"
   - pip install .