Drop support for python 3.5

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
                 cc: [gcc, clang]
                 include:
                     - python: a
-                      pyver: 3.5
+                      pyver: 3.6
                       sanitize: 0
 
                     - python: b

docs/changelog.rst

@@ -66,6 +66,8 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 - Workaround for bug in less that causes colors to reset at wrapped lines
   (:iss:`2381`)
 
+- Drop support for python 3.5
+
 
 0.16.0 [2020-01-28]
 --------------------

setup.py

@@ -20,6 +20,8 @@ from collections import namedtuple
 from contextlib import suppress
 from pathlib import Path
 
+if sys.version_info[:2] < (3, 6):
+    raise SystemExit('kitty requires python >= 3.6')
 base = os.path.dirname(os.path.abspath(__file__))
 sys.path.insert(0, 'glfw')
 glfw = importlib.import_module('glfw')