Add 3.8 to appveyor, and update versions

Author: nedbat

appveyor.yml

@@ -25,63 +25,75 @@ environment:
     - JOB: "2.7 32-bit"
       TOXENV: "py27"
       PYTHON: "C:\\Python27"
-      PYTHON_VERSION: "2.7.15"
+      PYTHON_VERSION: "2.7.17"
       PYTHON_ARCH: "32"
 
     - JOB: "2.7 64-bit"
       TOXENV: "py27"
       PYTHON: "C:\\Python27-x64"
-      PYTHON_VERSION: "2.7.15"
+      PYTHON_VERSION: "2.7.17"
       PYTHON_ARCH: "64"
 
     - JOB: "3.5 32-bit"
       TOXENV: "py35"
       PYTHON: "C:\\Python35"
-      PYTHON_VERSION: "3.5.4"
+      PYTHON_VERSION: "3.5.9"
       PYTHON_ARCH: "32"
 
     - JOB: "3.5 64-bit"
       TOXENV: "py35"
       PYTHON: "C:\\Python35-x64"
-      PYTHON_VERSION: "3.5.4"
+      PYTHON_VERSION: "3.5.9"
       PYTHON_ARCH: "64"
 
     - JOB: "3.6 32-bit"
       TOXENV: "py36"
       PYTHON: "C:\\Python36"
-      PYTHON_VERSION: "3.6.7"
+      PYTHON_VERSION: "3.6.9"
       PYTHON_ARCH: "32"
 
     - JOB: "3.6 64-bit"
       TOXENV: "py36"
       PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6.7"
+      PYTHON_VERSION: "3.6.9"
       PYTHON_ARCH: "64"
 
     - JOB: "3.7 32-bit"
       TOXENV: "py37"
       PYTHON: "C:\\Python37"
-      PYTHON_VERSION: "3.7.1"
+      PYTHON_VERSION: "3.7.5"
       PYTHON_ARCH: "32"
 
     - JOB: "3.7 64-bit"
       TOXENV: "py37"
       PYTHON: "C:\\Python37-x64"
-      PYTHON_VERSION: "3.7.1"
+      PYTHON_VERSION: "3.7.5"
+      PYTHON_ARCH: "64"
+
+    - JOB: "3.8 32-bit"
+      TOXENV: "py38"
+      PYTHON: "C:\\Python38"
+      PYTHON_VERSION: "3.8.0"
+      PYTHON_ARCH: "32"
+
+    - JOB: "3.8 64-bit"
+      TOXENV: "py38"
+      PYTHON: "C:\\Python38-x64"
+      PYTHON_VERSION: "3.8.0"
       PYTHON_ARCH: "64"
 
     # Meta coverage
     - JOB: "Meta 2.7"
       TOXENV: "py27"
       PYTHON: "C:\\Python27"
-      PYTHON_VERSION: "2.7.15"
+      PYTHON_VERSION: "2.7.17"
       PYTHON_ARCH: "32"
       COVERAGE_COVERAGE: "yes"
 
     - JOB: "Meta 3.6"
       TOXENV: "py36"
       PYTHON: "C:\\Python36"
-      PYTHON_VERSION: "3.6.7"
+      PYTHON_VERSION: "3.6.9"
       PYTHON_ARCH: "32"
       COVERAGE_COVERAGE: "yes"