ci: rot, drop python3.6 and 3.7

Author: maartenbreddels

.github/workflows/codequality.yaml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   code-quality:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:

.github/workflows/installation.yml

@@ -10,10 +10,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: 3.8
       - name: Install hatch
         run: pip install hatch
       - name: Build

.github/workflows/unittest.yml

@@ -17,11 +17,11 @@ jobs:
 
   unit-test:
     needs: [build, code-quality]
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", "3.11", "3.12", "3.13"]
+        python-version: [3.8, 3.9, "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -16,8 +16,6 @@ dependencies = [
 
 classifiers = [
     "License :: OSI Approved :: MIT License",
-    "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",
@@ -41,7 +39,7 @@ packages = ["react_ipywidgets", "reacton"]
 
 [project.optional-dependencies]
 dev = [
-    "ruff; python_version > '3.6'",
+    "ruff",
     "mypy",
     "pre-commit",
     "coverage",
@@ -57,7 +55,7 @@ dev = [
 ]
 
 generate = [
-    "ruff; python_version > '3.6'",
+    "ruff",
     "black",
     "bqplot",
     "jinja2",