turn off non-3.9 jobs on appveyor

Signed-off-by: oleg.hoefling <[email protected]>

Author: hoefling

.appveyor.yml

@@ -1,15 +1,15 @@
 environment:
   matrix:
-  - python: 27
-  - python: 27-x64
-  - python: 35
-  - python: 35-x64
-  - python: 36
-  - python: 36-x64
-  - python: 37
-  - python: 37-x64
-  - python: 38
-  - python: 38-x64
+#  - python: 27
+#  - python: 27-x64
+#  - python: 35
+#  - python: 35-x64
+#  - python: 36
+#  - python: 36-x64
+#  - python: 37
+#  - python: 37-x64
+#  - python: 38
+#  - python: 38-x64
   - python: 39
     python_version: 3.9.0
   - python: 39-x64