Forcing version 0.3.7 of openblas

Author: JohanMabille

.travis.yml

@@ -128,7 +128,7 @@ install:
     # Install xtensor and BLAS
     - conda install xtensor=0.21.4 -c conda-forge
     - if [[ "$BLAS" == "OpenBLAS" ]]; then
-        conda install openblas "blas * openblas" -c conda-forge;
+        conda install openblas==0.3.7 "blas * openblas" -c conda-forge;
       elif [[ "$BLAS" == "mkl" ]]; then
         conda install mkl;
       fi