Add python 3.9 build jobs

.appveyor.yml

@@ -10,8 +10,32 @@ environment:
   - python: 37-x64
   - python: 38
   - python: 38-x64
+  - python: 39
+    python_version: 3.9.0
+  - python: 39-x64
+    python_version: 3.9.0
 
 install:
+  - ps: |
+      # from https://github.com/appveyor/build-images/blob/27bde614bc60d7ef7a8bc46182f4d7582fa11b56/scripts/Windows/install_python.ps1#L88-L108
+      function InstallPythonEXE($targetPath, $version) {
+        $urlPlatform = ""
+        if ($targetPath -match '-x64$') {
+            $urlPlatform = "-amd64"
+        }
+        Write-Host "Installing Python $version$urlPlatform to $($targetPath)..." -ForegroundColor Cyan
+        $downloadUrl = "https://www.python.org/ftp/python/$version/python-$version$urlPlatform.exe"
+        Write-Host "Downloading $($downloadUrl)..."
+        $exePath = "$env:TEMP\python-$version.exe"
+        (New-Object Net.WebClient).DownloadFile($downloadUrl, $exePath)
+        Write-Host "Installing..."
+        cmd /c start /wait $exePath /quiet TargetDir="$targetPath" Shortcuts=0 Include_launcher=1 InstallLauncherAllUsers=1 Include_debug=1
+        Remove-Item $exePath
+        Write-Host "Installed Python $version" -ForegroundColor Green
+      }
+      if ( -not ( Test-Path -Path C:\\Python$env:PYTHON -PathType Container ) ) {
+        InstallPythonEXE C:\\Python$env:PYTHON $env:PYTHON_VERSION
+      }
   - SET PATH=C:\\Python%PYTHON%;c:\\Python%PYTHON%\\scripts;%PATH%
   - python -m pip install -U pip wheel setuptools
 

.github/workflows/macosx.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python: [2.7, 3.5, 3.6, 3.7, 3.8]
+        python: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9]
     steps:
       - uses: actions/checkout@v1
       - name: Setup Python

.github/workflows/manylinux2010.yml

@@ -6,7 +6,7 @@ jobs:
     container: quay.io/pypa/manylinux2010_x86_64
     strategy:
       matrix:
-        python-abi: [cp27-cp27m, cp27-cp27mu, cp35-cp35m, cp36-cp36m, cp37-cp37m, cp38-cp38]
+        python-abi: [cp27-cp27m, cp27-cp27mu, cp35-cp35m, cp36-cp36m, cp37-cp37m, cp38-cp38, cp39-cp39]
     steps:
       - uses: actions/checkout@v1
       - name: Install build dependencies

.github/workflows/sdist.yml

@@ -5,10 +5,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install build dependencies
         run: |
           pip install --upgrade pip setuptools wheel

.travis.yml

@@ -14,7 +14,7 @@ matrix:
   - python: 3.8
     dist: xenial
     sudo: required
-  - python: 3.9-dev
+  - python: 3.9
     dist: xenial
     sudo: required
 env: