build(python): drop support for Python 3.6 and 3.7 (reanahub#793)

BREAKING CHANGE: drop support for Python 3.6 and 3.7

Closes reanahub#784

.github/workflows/ci.yml

@@ -140,7 +140,18 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        include:
+          - python-version: "3.8"
+            continue-on-error: false
+          - python-version: "3.9"
+            continue-on-error: true
+          - python-version: "3.10"
+            continue-on-error: true
+          - python-version: "3.11"
+            continue-on-error: true
+          - python-version: "3.12"
+            continue-on-error: true
+    continue-on-error: ${{ matrix.continue-on-error }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4

setup.py

@@ -1,6 +1,6 @@
 #
 # This file is part of REANA.
-# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022, 2023 CERN.
+# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -90,10 +90,11 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python",
         "Topic :: Internet :: WWW/HTTP :: Dynamic Content",