appveyor pypy3

(cherry picked from commit 593ea32ffa03f7410299bbb7b08f1d078b67ecc0)

.appveyor.yml

@@ -13,6 +13,10 @@ environment:
   TEST_OPTIONS:
   DEPLOY: YES
   matrix:
+  - PYTHON: C:/vp/pypy3
+    EXECUTABLE: bin/pypy3.exe
+    PIP_DIR: bin
+    VENV: YES
   - PYTHON: C:/vp/pypy2
     EXECUTABLE: bin/pypy.exe
     PIP_DIR: bin
@@ -43,7 +47,12 @@ install:
 - ps: |
       if ($env:PYTHON -eq "c:/vp/pypy2")
       {
-        c:\pillow\winbuild\appveyor_install_pypy.cmd
+        c:\pillow\winbuild\appveyor_install_pypy2.cmd
+      }
+- ps: |
+      if ($env:PYTHON -eq "c:/vp/pypy3")
+      {
+        c:\pillow\winbuild\appveyor_install_pypy3.cmd
       }
 - ps: |
       if ($env:PYTHON -eq "c:/msys64/mingw32")

winbuild/appveyor_install_pypy3.cmd

@@ -0,0 +1,3 @@
+curl -fsSL -o pypy3.zip https://bitbucket.org/pypy/pypy/downloads/pypy3.6-v7.1.1-win32.zip
+7z x pypy3.zip -oc:\
+c:\Python37\Scripts\virtualenv.exe -p c:\pypy3.6-v7.1.1-win32\pypy3.exe c:\vp\pypy3

winbuild/config.py

@@ -6,6 +6,7 @@ PILLOW_DEPENDS_DIR = "C:\\pillow-depends\\"
 pythons = {
     "27": {"compiler": 7, "vc": 2010},
     "pypy2": {"compiler": 7, "vc": 2010},
+    "pypy3": {"compiler": 7, "vc": 2010},
     "35": {"compiler": 7.1, "vc": 2015},
     "36": {"compiler": 7.1, "vc": 2015},
     "37": {"compiler": 7.1, "vc": 2015},