ci(lint-test): deprecate eol python versions

Python 3.6 and 3.7 lack compatibility with Ubuntu 22.04, which creates
problems and inconsistencies for the actions runners. Fortunately, both
3.6 and 3.7 are now end-of-life, so we can safely phase them out.

.github/workflows/ci-lint-test.yml

@@ -42,8 +42,8 @@ jobs:
         shell: bash
     strategy:
       matrix:
-        python: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "pypy3.6", "pypy3.7", "pypy3.8", "pypy3.9", "pypy3.10", "pypy3.11"]
-        os: [ubuntu-20.04, macos-latest, windows-latest]
+        python: ["3.8", "3.9", "3.10", "3.11", "pypy3.6", "pypy3.7", "pypy3.8", "pypy3.9", "pypy3.10", "pypy3.11"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - name: "[INIT] Checkout repository"
         uses: actions/checkout@v3

pyproject.toml

@@ -12,7 +12,7 @@ include = ["proselint/", "tests/", "proselint/demo.md"]
 exclude = ["tests/.gitignore"]
 
 [tool.poetry.dependencies]
-python = "^3.6.7"
+python = "^3.8"
 click = "^8.0.0"
 future = "^0.18.2"