Remove py36 from test

Author: chdemko

.travis.yml

@@ -3,11 +3,8 @@ before_install:
   - wget https://github.com/jgm/pandoc/releases/download/2.5/pandoc-2.5-1-amd64.deb
   - sudo dpkg -i pandoc-2.5-1-amd64.deb
   - pandoc -v
-  - sudo add-apt-repository -y ppa:deadsnakes/ppa
-  - sudo apt-get update
   - sudo apt-get install python2.7
   - sudo apt-get install python
-  - sudo apt-get install python3.6
   - sudo apt-get install python-pip
   - pip install --user --upgrade pip
 install:

tox.ini

@@ -1,15 +1,13 @@
 [tox]
-envlist = py2,py3,py36
+envlist = py2,py3
 
 [testenv]
 deps =
 	py2: coverage
 	py3: coverage
 	py3: pylint
-	py36: black
 commands =
     py2: python2 -W ignore -m coverage run    --source=pandoc_codeblock_include setup.py test
     py3: coverage run -a --source=pandoc_codeblock_include setup.py test
     py3: pylint pandoc_codeblock_include.py setup.py tests/test_include.py
-    py36: black --check pandoc_codeblock_include.py setup.py tests/test_include.py