testing from dist install does not work, use editable install again

.azure/scripts/test.yml

@@ -12,8 +12,8 @@ steps:
 - template: sdist.yml
 
 - script: |
-    python -m pip install dist/*
-  displayName: 'Install module from sdist'
+    python -m pip install -e .
+  displayName: 'Build/install module'
 
 - script: |
     pip install numpy jedi typing_extensions