Update test.yml

Author: joshua-gould

.github/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements.txt pytest
+        pip install -r requirements.txt pytest miniwdl
         pip install -e .
 
     - name: Test with pytest