Drops old Pythons and adds newer ones for Appveyor build

appveyor.yml

@@ -5,25 +5,6 @@ version: 1.2.14.{build}
 
 environment:
   matrix:
-    # Python **2.6** and **3.3** are no more supported
-    - PYTHON: "C:\\Python27"
-      TOX_ENV: "py27"
-
-    - PYTHON: "C:\\Python27-x64"
-      TOX_ENV: "py27"
-
-    - PYTHON: "C:\\Python35"
-      TOX_ENV: "py35"
-
-    - PYTHON: "C:\\Python35-x64"
-      TOX_ENV: "py35"
-
-    - PYTHON: "C:\\Python36"
-      TOX_ENV: "py36"
-
-    - PYTHON: "C:\\Python36-x64"
-      TOX_ENV: "py36"
-
     - PYTHON: "C:\\Python37"
       TOX_ENV: "py37"
 
@@ -36,6 +17,24 @@ environment:
     - PYTHON: "C:\\Python38-x64"
       TOX_ENV: "py38"
 
+    - PYTHON: "C:\\Python39"
+      TOX_ENV: "py39"
+
+    - PYTHON: "C:\\Python39-x64"
+      TOX_ENV: "py39"
+
+    - PYTHON: "C:\\Python310"
+      TOX_ENV: "py310"
+
+    - PYTHON: "C:\\Python310-x64"
+      TOX_ENV: "py310"
+
+    - PYTHON: "C:\\Python311"
+      TOX_ENV: "py311"
+
+    - PYTHON: "C:\\Python311-x64"
+      TOX_ENV: "py311"
+
 init:
   - set PATH=%PYTHON%;%PYTHON%\Scripts;C:\MinGW\msys\1.0\bin;%PATH%
   - "git config --system http.sslcainfo \"C:\\Program Files\\Git\\mingw64\\ssl\\certs\\ca-bundle.crt\""