Merge pull request #233 from JohanMabille/upgrade

Upgraded to latest version of xtensor

Author: JohanMabille

.appveyor.yml

@@ -22,7 +22,7 @@ install:
   - conda update -q conda
   - conda info -a
   - conda install gtest cmake -c conda-forge
-  - conda install pytest numpy pybind11==2.4.3 xtensor==0.21.2 -c conda-forge
+  - conda install pytest numpy pybind11==2.4.3 xtensor==0.21.4 -c conda-forge
   - "set PYTHONHOME=%MINICONDA%"
   - cmake -G "NMake Makefiles" -D CMAKE_INSTALL_PREFIX=%MINICONDA%\\Library -D BUILD_TESTS=ON -D PYTHON_EXECUTABLE=%MINICONDA%\\python.exe .
   - nmake test_xtensor_python

.travis.yml

@@ -42,25 +42,6 @@ matrix:
           packages:
             - g++-7
       env: COMPILER=gcc GCC=7 PY=3
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            - g++-4.9
-            - clang-3.6
-      env: COMPILER=clang CLANG=3.6 PY=3
-    - os: linux
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-xenial-3.9
-          packages:
-            - g++-4.9
-            - clang-3.9
-      env: COMPILER=clang CLANG=3.9 PY=3
     - os: linux
       addons:
         apt:
@@ -156,7 +137,7 @@ install:
       else
         conda install pybind11==${PYBIND11_VERSION} -c conda-forge
       fi
-    - conda install xtensor==0.21.2 -c conda-forge
+    - conda install xtensor==0.21.4 -c conda-forge
     - cmake -D DOWNLOAD_GTEST=ON -D CMAKE_INSTALL_PREFIX=$HOME/miniconda -D PYTHON_EXECUTABLE=$PY_EXE .
     - make -j2 test_xtensor_python
     - make install