some defensive programming around moving the version def

Author: flowstate

.github/workflows/pr-preview.yml

@@ -12,10 +12,11 @@ jobs:
         with:
           python-version: '3.12'
 
+      # Install all dependencies from pyproject.toml
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install requests
+          pip install -e .
 
       - name: Set preview version
         run: |