Migrate to 0.3.0

Author: SylvainCorlay

.appveyor.yml

@@ -24,7 +24,7 @@ install:
   - conda info -a
   - conda install pytest -c conda-forge
   - cd test
-  - conda install xtensor==0.2.2 pytest numpy pybind11==2.0.0 -c conda-forge
+  - conda install xtensor==0.3.0 pytest numpy pybind11==2.0.0 -c conda-forge
   - xcopy /S %APPVEYOR_BUILD_FOLDER%\include %MINICONDA%\include
 
 build_script:

.travis.yml

@@ -59,7 +59,7 @@ install:
     # Useful for debugging any issues with conda
     - conda info -a
     - cd test
-    - conda install xtensor==0.2.2 pytest numpy pybind11==2.0.0 -c conda-forge
+    - conda install xtensor==0.3.0 pytest numpy pybind11==2.0.0 -c conda-forge
     - cp -r $TRAVIS_BUILD_DIR/include/* $HOME/miniconda/include/
 
 script: