Install deps in gh-actions

Author: stefanradev93

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-latest]
+        os: [ubuntu-latest, windows-latest]
         python-version: ['3.9']
 
     steps:
@@ -21,6 +21,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install -r requirements.txt
         pip install tox tox-gh-actions
     - name: Test with tox
       run: tox