[FIX] Appveyor now uses Python3

appveyor.yml

@@ -10,10 +10,16 @@ environment:
     secure: N+tYP6JrVCZ12LX7MUmHYJ8kx07F4A1hXtmEW01RmhrrQBdylIf0SO/eEfW5f4ox3S4xG/lgGSzNlZckvgifrsYeeBkWwoSH5/AJ3SnOJ7HBVojVt2t3bAznS6x3aPT7WDpwGN7piwus9aHSmpKaOzRoEOBKfgHv3aUzb907C0d0Yr12LU/4cIoTAn7jMziifSq45Z50lsQwzYic/VkarxTh+GXuCCm1Mb8F686H8i6Smm1Q1n9BsXowYnzwdrTZSBVOUtpd48Mh9JKgSNhfmQ==
   testpypipw:
     secure: CcyBI8e/2LdIT2aYIytTAgR4795DNBDM/ztsz1kqZYYOeNc3zlJWLdYWrnjCHn5W6/ZcAHrsxCdCMHvtr6PIVgBRpl2RR3fk2jKTzKqJJsLW871q30BsE0kws32f1IiqfjVtLn8BUC91IJ2xBBXtOYktf1tCMi3zJMSF9+MIOQKIu298bIRnD1Lc+4lzcSZJOn4I7dOMdzlcCMRqhtO58TGwR/hD+22FHjyWVB8nLL18AO+XXS9lHSOUrH6rD5NYvVFZD68oV/RrCGAjRmfMnw==
+  # Set default pytohn, the real matrinx is in the tox settings.
+  matrix:
+    - PYTHON: "C:\\Python36"
+      PYTHON_VERSION: 3.6
+      PYTHON_ARCH: 32
 
 build: off
 
 install:
+  - set PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%
   - pip install .[test]
 
 test_script:
@@ -34,15 +40,15 @@ after_test:
   - cmd: "echo repository: https://test.pypi.org/legacy/ >> %USERPROFILE%\\.pypirc"
   - cmd: "echo username: __token__ >> %USERPROFILE%\\.pypirc"
   - cmd: "echo password: %testpypipw% >> %USERPROFILE%\\.pypirc"
-  
+
   # Create source distribution.
   - python -m setup sdist
-  
+
   # Upload to pypi.
   # More precisely. The master and release builds will be uploaded to pypi. Test branch will be
   # uploaded to test-pypi the test builds.
   # See more at https://stackoverflow.com/a/39155147/2506522
-  
+
   - IF %APPVEYOR_REPO_BRANCH%==master (
       twine upload -r pypi dist\\wexpect*.tar.gz
     )
@@ -52,4 +58,3 @@ after_test:
   - IF %APPVEYOR_REPO_BRANCH%==test (
       twine upload -r testpypi dist\\wexpect*.tar.gz
     )
-