Drop py36

Author: Adminiuga

.travis.yml

@@ -2,10 +2,8 @@ language: python
 matrix:
   fast_finish: true
   include:
-    - python: "3.6"
+    - python: "3.7"
       env: TOXENV=lint
-    - python: "3.6"
-      env: TOXENV=py36
     - python: "3.7"
       env: TOXENV=py37
     - python: "3.8"

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py36, py37, py38, lint
+envlist = py37, py38, lint
 skip_missing_interpreters = True
 
 [testenv]