squash! squash! DROPME - temporarily upgrade to numpy-1.24.2

Allow CI-tests only for Python 3.8 which seems to be able to install
numpy and numba.

Author: pavoljuhas

.github/workflows/ci.yml

@@ -149,7 +149,7 @@ jobs:
     name: Pytest Ubuntu
     strategy:
       matrix:
-        python-version: [ '3.8', '3.9', '3.10' ]
+        python-version: [ '3.8' ]
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
@@ -255,7 +255,7 @@ jobs:
     name: Pytest Windows
     strategy:
       matrix:
-        python-version: [ '3.8', '3.9', '3.10' ]
+        python-version: [ '3.8' ]
     runs-on: windows-2019
     steps:
       - uses: actions/checkout@v2
@@ -280,7 +280,7 @@ jobs:
     name: Pytest MacOS
     strategy:
       matrix:
-        python-version: [ '3.8', '3.9', '3.10' ]
+        python-version: [ '3.8' ]
     runs-on: macos-12
     steps:
       - uses: actions/checkout@v2