Drop support for Python 3.5

This will help with typing in particular.

Fixes #308.

.github/workflows/main.yml

@@ -19,12 +19,10 @@ jobs:
       fail-fast: false
       matrix:
         name: [
-          "windows-py35",
           "windows-py36",
           "windows-py37",
           "windows-pypy3",
 
-          "ubuntu-py35",
           "ubuntu-py36",
           "ubuntu-py36-pytestmain",
           "ubuntu-py37",
@@ -37,10 +35,6 @@ jobs:
         ]
 
         include:
-          - name: "windows-py35"
-            python: "3.5"
-            os: windows-latest
-            tox_env: "py35"
           - name: "windows-py36"
             python: "3.6"
             os: windows-latest
@@ -53,11 +47,6 @@ jobs:
             python: "pypy3"
             os: windows-latest
             tox_env: "pypy3"
-          - name: "ubuntu-py35"
-            python: "3.5"
-            os: ubuntu-latest
-            tox_env: "py35"
-            use_coverage: true
           - name: "ubuntu-py36"
             python: "3.6"
             os: ubuntu-latest

changelog/308.removal.rst

@@ -0,0 +1 @@
+Remove official support for Python 3.5.

setup.py

@@ -13,7 +13,7 @@
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Programming Language :: Python :: 3 :: Only",
-] + [("Programming Language :: Python :: %s" % x) for x in "3 3.5 3.6 3.7 3.8".split()]
+] + [("Programming Language :: Python :: %s" % x) for x in "3 3.6 3.7 3.8".split()]
 
 with open("README.rst", "rb") as fd:
     long_description = fd.read().decode("utf-8")
@@ -39,7 +39,7 @@ def main():
         author="Holger Krekel",
         author_email="holger@merlinux.eu",
         url="https://github.com/pytest-dev/pluggy",
-        python_requires=">=3.5",
+        python_requires=">=3.6",
         install_requires=['importlib-metadata>=0.12;python_version<"3.8"'],
         extras_require=EXTRAS_REQUIRE,
         classifiers=classifiers,

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=linting,docs,py{35,36,37,38,py3},py{36,37}-pytest{master}
+envlist=linting,docs,py{36,37,38,py3},py{36,37}-pytest{master}
 
 [testenv]
 commands=