Drop support for Python 3.6 (end-of-lifed). Add support for Python 3.10.

.drone.yml

@@ -1,17 +1,3 @@
----
-kind: pipeline
-name: python-3-6-alpine-3-9
-
-clone:
-  skip_verify: true
-
-steps:
-- name: build
-  image: alpine:3.9
-  pull: always
-  commands:
-    - tests/run-ci-tests
----
 kind: pipeline
 name: python-3-7-alpine-3-10
 

setup.py

@@ -24,4 +24,5 @@ setup(
     install_requires=(),
     extras_require={"multi_file": ["MarkdownPP"],},
     include_package_data=True,
+    python_requires='>3.7.0',
 )

test_requirements.txt

@@ -12,7 +12,7 @@ pathspec==0.8.1; python_version >= '3.8'
 py==1.10.0
 pycodestyle==2.6.0
 pyflakes==2.2.0
-pytest==6.1.2
+pytest==6.2.5
 pytest-cov==2.10.1
 regex; python_version >= '3.8'
-typed-ast==1.4.2; python_version >= '3.8'
+typed-ast; python_version >= '3.8'

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py36,py37,py38,py39
+envlist = py37,py38,py39,py310
 skip_missing_interpreters = True
 skipsdist = True
 minversion = 3.14.1