revert to ubuntu-only

Author: terriko

.github/workflows/pythonapp.yml

@@ -3,13 +3,12 @@ name: cve-bin-tool
 on: [push, pull_request]
 
 jobs:
-
   build:
 
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-         os: [ubuntu-latest, windows-latest]
+         os: [ubuntu-latest]
          python: [3.6, 3.7]
     steps:
     - uses: actions/checkout@v1
@@ -21,12 +20,11 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
-    - name: Run tests
-      run: |
-        ACTIONS=1 python setup.py test
     - name: Lint with black
       run: |
         pip install black
         black --check cve_bin_tool/
         black --check test/
-
+    - name: Run tests
+      run: |
+        ACTIONS=1 python setup.py test