MAINT update version numpy scipy

Author: glemaitre

.travis.yml

@@ -35,7 +35,7 @@ matrix:
     - env: DISTRIB="conda" PYTHON_VERSION="3.6"
            NUMPY_VERSION="*" SCIPY_VERSION="*" SKLEARN_VERSION="0.21"
     - env: DISTRIB="conda" PYTHON_VERSION="3.7"
-           NUMPY_VERSION="1.13.1" SCIPY_VERSION="0.19.1" SKLEARN_VERSION="0.21"
+           NUMPY_VERSION="1.14.6" SCIPY_VERSION="1.1.0" SKLEARN_VERSION="0.21"
     - env: DISTRIB="conda" PYTHON_VERSION="3.7"
            NUMPY_VERSION="*" SCIPY_VERSION="*" SKLEARN_VERSION="master"
   allow_failures: