use python 3.7 for VS

.gitlab-ci.yml

@@ -3,7 +3,7 @@ stages:
   - test
   - deploy
 
-build-3.6-VS2017:
+build-3.7-VS2017:
   stage:
     build
   tags:
@@ -15,8 +15,8 @@ build-3.6-VS2017:
     - git submodule sync --recursive
     - git submodule update --init --recursive
   script:
-    - set Path=%Path%;C:\Program Files\Python36;C:\Program Files\Python36\Scripts;
-    - virtualenv --clear -p "C:\Program Files \(x86\)\Microsoft Visual Studio\Shared\Python36_64\python.exe" .
+    - set Path=%Path%;C:\Program Files\Python37;C:\Program Files\Python37\Scripts;
+    - virtualenv --clear -p "C:\Program Files\Python37\python.exe" .
     - call .\Scripts\activate
     - python setup.py bdist_wheel --dist-dir dist3
   artifacts:
@@ -85,16 +85,16 @@ build-2.7-macos:
     paths:
       - dist2/
 
-test-3.6-VS2017:
+test-3.7-VS2017:
   stage:
     test
   tags:
     - VS2017
   dependencies:
-    - build-3.6-VS2017
+    - build-3.7-VS2017
   script:
-    - set Path=%Path%;C:\Program Files\Python36;C:\Program Files\Python36\Scripts;
-    - virtualenv --clear -p "C:\Program Files \(x86\)\Microsoft Visual Studio\Shared\Python36_64\python.exe" .
+    - set Path=%Path%;C:\Program Files\Python37;C:\Program Files\Python37\Scripts;
+    - virtualenv --clear -p "C:\Program Files\Python37\python.exe" .
     - call .\Scripts\activate
     - cd dist3
     - FOR %%a IN (*.whl) DO pip install %%a
@@ -159,13 +159,13 @@ test-2.7-macos:
     - cd tests
     - python -m unittest discover
 
-deploy-3.6-VS2017:
+deploy-3.7-VS2017:
   stage:
     deploy
   tags:
     - VS2017
   dependencies:
-    - build-3.6-VS2017
+    - build-3.7-VS2017
   script:
     - mkdir release
     - cd dist3