ci(lint-test): adjust 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

@@ -10,7 +10,7 @@ jobs:
         shell: bash
     strategy:
       matrix:
-        python: [3.9]
+        python: ["3.11.0"]
     steps:
       - name: "[INIT] Checkout repository"
         uses: actions/checkout@v3
@@ -36,13 +36,13 @@ jobs:
   test-cover:
     name: Test & Cover
     if: "!(contains(github.event.head_commit.message, '[skip_ci]'))"
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     defaults:
       run:
         shell: bash
     strategy:
       matrix:
-        python: [3.6, 3.7, 3.8, 3.9, pypy3]
+        python: ["3.8", "3.9", "3.10", "3.11", "pypy3.8", "pypy3.9", "pypy3.10"]
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - name: "[INIT] Checkout repository"

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"