Remove deprecated "oldest-supported-numpy" pip package

Co-authored-by: Patrick Kunzmann <padix.key@gmail.com>

Author: ncoish

.github/workflows/test_and_deploy.yml

@@ -37,7 +37,7 @@ jobs:
           toolchain: stable
           override: true
       - name: Install dependencies
-        run: pip install "maturin==$MATURIN_VERSION" "oldest-supported-numpy" pytest
+        run: pip install "maturin==$MATURIN_VERSION" "numpy >=1.26,<1.27" pytest
       - name: Build wheel
         run: maturin build --release -i python -o dist
       - name: Install wheel