Temp: Enable more python versions, to verify the fix

Signed-off-by: Andreas Maier <andreas.r.maier@gmx.de>

appveyor.yml

@@ -2,21 +2,21 @@
 environment:
   matrix:
 
-    - TOX_ENV: win64_py27_32
-      UNIX_PATH: none
-      PYTHON_CMD: python
-
-#    - TOX_ENV: win64_py27_64
+#    - TOX_ENV: win64_py27_32
 #      UNIX_PATH: none
 #      PYTHON_CMD: python
 
-#    - TOX_ENV: win64_py34_32
+#    - TOX_ENV: win64_py27_64
 #      UNIX_PATH: none
 #      PYTHON_CMD: python
 
-#    - TOX_ENV: win64_py34_64
-#      UNIX_PATH: none
-#      PYTHON_CMD: python
+    - TOX_ENV: win64_py34_32
+      UNIX_PATH: none
+      PYTHON_CMD: python
+
+    - TOX_ENV: win64_py34_64
+      UNIX_PATH: none
+      PYTHON_CMD: python
 
 #    - TOX_ENV: win64_py35_32
 #      UNIX_PATH: none
@@ -38,9 +38,9 @@ environment:
 #      UNIX_PATH: none
 #      PYTHON_CMD: python
 
-#    - TOX_ENV: win64_py37_64
-#      UNIX_PATH: none
-#      PYTHON_CMD: python
+    - TOX_ENV: win64_py37_64
+      UNIX_PATH: none
+      PYTHON_CMD: python
 
 # TODO: Disabled because python2.7 with cygwin 32-bit fails with:
 #       "virtualenv is not compatible with this system or executable"
@@ -54,10 +54,10 @@ environment:
 #      PYTHON_CMD: python2.7
 #      PIP_CMD: pip
 
-    - TOX_ENV: cygwin64_py36
-      UNIX_PATH: C:\cygwin64\bin
-      PYTHON_CMD: python3.6m
-      PIP_CMD: pip
+#    - TOX_ENV: cygwin64_py36
+#      UNIX_PATH: C:\cygwin64\bin
+#      PYTHON_CMD: python3.6m
+#      PIP_CMD: pip
 
 configuration:
 # These values will become the values of the PACKAGE_LEVEL env.var.