Speedup CI (#309)

* speedup ci

* use req file

* remove cflag as only lxml is affected, but its never build as pip uses available wheels

.github/workflows/deploy.yml

@@ -38,16 +38,11 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: files
-          fetch-depth: 0
           path: ${{env.OUTPUT_PATH}}
 
       - name: Install requirements using pip
         shell: bash
-        env:
-          CFLAGS: '-O0'
-        run: |
-          python3 -m pip install --upgrade pip setuptools
-          python3 -m pip install --requirement requirements.txt
+        run: python3 -m pip install --requirement requirements.txt
 
       - name: Run script
         id: run