Add appveyor file

Signed-off-by: Uilian Ries <uilianries@gmail.com>

Author: uilianries

appveyor.yml

@@ -1,10 +1,13 @@
+build: false
+
 environment:
+    PYTHON_ARCH: "32"
 
-  matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PYTHON: "C:\\Python27"
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PYTHON: "C:\\Python38"
+    matrix:
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+          PYTHON: "C:\\Python27"
+        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+          PYTHON: "C:\\Python38"
 
 test_script:
-  - python.exe tests/run_tests.py
+- python tests/run_tests.py