Adding cibuildwheel to appveyor

Author: michaeltryby

appveyor.yml

@@ -3,6 +3,10 @@
 environment:
   passphrase:
     secure: En1qcj1/l2B3Nov+vOHlfRrFZk00bg1HPRouD64Gzfw=
+  CIBW_SKIP: cp27-* cp34-* cp35-* *-win32
+  CIBW_BEFORE_BUILD: pip install six
+  CIBW_TEST_COMMAND: pytest {project}\\tests
+  CIBW_TEST_REQUIRES: pytest numpy
   matrix:
     - PYTHON: "C:\\Python36-x64"
 
@@ -20,3 +24,17 @@ build: off
 test_script:
     - before_build.bat %APPVEYOR_BUILD_FOLDER%
     - "%PYTHON%\\python.exe -m tox -v"
+
+after_test:
+    - "%PYTHON%\\python.exe -m pip install cibuildwheel==0.10.1"
+    - "%PYTHON%\\python.exe -m cibuildwheel --output-dir wheelhouse .\\swmm_python\\output"
+    - "%PYTHON%\\python.exe -m cibuildwheel --output-dir wheelhouse .\\swmm_python\\toolkit"
+
+artifacts:
+    - path: "wheelhouse\\*.whl"
+      name: Wheels
+
+cache:
+  - C:\ProgramData\chocolatey\bin -> appveyor.yml
+  - C:\ProgramData\chocolatey\lib -> appveyor.yml
+  - C:\projects\epanet-python\.tox -> tox.ini