TST/MAINT: Save running costs by only testing against default version of NumPy

Author: Kai-Striega

.github/workflows/pythonpackage.yml

@@ -10,7 +10,6 @@ jobs:
       max-parallel: 4
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
-        numpy-version: ["1.20", "1.21", "1.22", "1.23"]
 
     steps:
     - uses: actions/checkout@v3
@@ -21,7 +20,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install numpy==${{ matrix.numpy-version }}
+        pip install numpy
     - name: Lint with flake8
       run: |
         pip install flake8