Migrate Windows test jobs to GitHub actions

Author: atodorov

.github/workflows/testing.yml

@@ -84,3 +84,54 @@ jobs:
       shell: bash
       run: |
         ./.travis/build.sh
+
+  windows-latest-python-381:
+    runs-on: windows-latest
+    name: 'windows-latest / Python 3.8.1'
+    env:
+      PYTHON: 3
+      PYENV: '3.8.1'
+      TRAVIS_OS_NAME: windows
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Build and test gssapi
+      shell: bash
+      run: |
+        ./.travis/build.sh
+
+  windows-latest-python-373:
+    runs-on: windows-latest
+    name: 'windows-latest / Python 3.7.3'
+    env:
+      PYTHON: 3
+      PYENV: '3.7.3'
+      TRAVIS_OS_NAME: windows
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Build and test gssapi
+      shell: bash
+      run: |
+        ./.travis/build.sh
+
+  windows-latest-python-368:
+    runs-on: windows-latest
+    name: 'windows-latest / Python 3.6.8'
+    env:
+      PYTHON: 3
+      PYENV: '3.6.8'
+      TRAVIS_OS_NAME: windows
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Build and test gssapi
+      shell: bash
+      run: |
+        ./.travis/build.sh

.travis.yml

@@ -29,18 +29,6 @@ script:
 jobs:
   # need to explictly define each builder for test due to different os types
   include:
-  - &win_test
-    stage: test
-    env: PYTHON="3" PYENV="3.8.1"
-    os: windows
-    language: sh  # Windows not supported yet
-
-  - <<: *win_test
-    env: PYTHON="3" PYENV="3.7.3"
-
-  - <<: *win_test
-    env: PYTHON="3" PYENV="3.6.8"
-
   - stage: deploy latest docs
     script: skip
     env: