Windows wheels for Python 3.12

Author: jdavid

appveyor.yml

@@ -1,4 +1,4 @@
-version: 1.12.{build}
+version: 1.13.{build}
 image: Visual Studio 2019
 configuration: Release
 environment:
@@ -23,6 +23,10 @@ environment:
     PYTHON: 'C:\Python311\python.exe'
   - GENERATOR: 'Visual Studio 14 Win64'
     PYTHON: 'C:\Python311-x64\python.exe'
+  - GENERATOR: 'Visual Studio 14'
+    PYTHON: 'C:\Python312\python.exe'
+  - GENERATOR: 'Visual Studio 14 Win64'
+    PYTHON: 'C:\Python312-x64\python.exe'
 
 matrix:
   fast_finish: true