Remove support for EOL python versions

.circleci/config.yml

@@ -4,13 +4,29 @@ version: 2.1
 orbs:
   orb: invocations/[email protected]
 
+executors:
+  # Basically extending what the python orb's executor does:
+  # - s/tag/version/
+  # - default to 3.6, not 3.8 or w/e
+  # - set common environment vars
+  default:
+    parameters:
+      version:
+        type: string
+        default: "3.11"
+    docker:
+      - image: cimg/python:<< parameters.version >>
+      # TODO: explicitly select 'resource_class: small' if credits ever become
+      # too tight; seems like small uses 5 credits/min and medium, the default,
+      # uses 10
+    environment:
+      TERM: screen-256color
 
 jobs:
   # Unit+integration tests, with coverage
   coverage:
     executor:
-      name: orb/default
-      version: "3.6"
+      name: default
     steps:
       - orb/setup
       - run: inv ci.make-sudouser
@@ -19,26 +35,23 @@ jobs:
 
   regression:
     executor:
-      name: orb/default
-      version: "3.6"
+      name: default
     steps:
       - orb/setup
       - run: inv regression
       - orb/debug
 
   doctests:
     executor:
-      name: orb/default
-      version: "3.6"
+      name: default
     steps:
       - orb/setup
       - run: inv www.doctest
       - orb/debug
 
   typecheck:
     executor:
-      name: orb/default
-      version: "3.6"
+      name: default
     steps:
       - orb/setup
       - run: mypy .
@@ -65,7 +78,7 @@ workflows:
           requires: ["Test"]
           matrix:
             parameters:
-              version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+              version: ["3.9", "3.10", "3.11"]
       - orb/docs:
           name: "Docs"
           requires: ["Test"]

setup.py

@@ -40,7 +40,7 @@
         "Changelog": "https://www.pyinvoke.org/changelog.html",
         "CI": "https://app.circleci.com/pipelines/github/pyinvoke/invoke",
     },
-    python_requires=">=3.6",
+    python_requires=">=3.9",
     packages=find_packages(exclude=exclude),
     include_package_data=True,
     entry_points={
@@ -62,9 +62,6 @@
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3 :: Only",
-        "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",

sites/www/installing.rst

@@ -10,7 +10,7 @@ via `pip <https://pip.pypa.io>`_::
 
     $ pip install invoke
 
-We currently support **Python 3.6+**. Users still on Python 3.5 or older are
+We currently support **Python 3.9+**. Users still on Python 3.8 or older are
 urged to upgrade.
 
 As long as you have a supported Python interpreter, **there are no other