Remove support for Python 3.6

Author: David Fritzsche

.github/workflows/pythonpackage.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -41,7 +41,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -55,30 +55,6 @@ jobs:
         inv mkdir build/coverage-data
         inv tox -e "py-*"
 
-  test-py36:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      max-parallel: 4
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.6"]
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install pip==21.3.1
-        python -m pip install invoke tox
-    - name: Run tox
-      env:
-        TOX_PARALLEL_NO_SPINNER: "1"
-      run: |
-        inv mkdir build/coverage-data
-        inv tox -e "py36-*"
 
   lint:
     runs-on: ubuntu-latest
@@ -90,7 +66,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

pyproject.toml

@@ -18,7 +18,6 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: OS Independent",
     "Operating System :: POSIX",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
@@ -33,7 +32,7 @@ requires = [
     "pytest>=6,<8",
     "mypy",
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 
 [tool.flit.entrypoints.pytest11]
 mypy-testing = "pytest_mypy_testing.plugin"

tox.ini

@@ -3,7 +3,6 @@
 [tox]
 isolated_build = True
 envlist =
-    {py36}-pytest{60,61,62,70}-mypy{0910,0931,0971}
     {py37,py38,py39}-pytest{62,70,71}-mypy{0910,0931,0971}
     {py310}-pytest{62,71}-mypy{0910,0931,0971}
     py-pytest{62,70,71}-mypy{0910,0931,0971}
@@ -12,7 +11,6 @@ envlist =
 [testenv]
 deps =
     coverage[toml]
-    dataclasses;python_version<"3.7"
     pytest53: pytest~=5.3.5
     pytest54: pytest~=5.4.1
     pytest60: pytest~=6.0.2
@@ -34,7 +32,7 @@ deps =
 setenv =
     COVERAGE_FILE={toxinidir}/build/{envname}/coverage
 commands =
-    coverage run --context "{envname}" -m pytest \
+    python -m coverage run --context "{envname}" -m pytest \
       {posargs} \
       --html={toxinidir}/build/{envname}/pytest-report.html \
       --junitxml={toxinidir}/build/{envname}/junit.xml