use Python v3.6.1

Author: bear

Makefile

@@ -13,10 +13,10 @@ env:
 
 pyenv:
 	pyenv install -s 2.7.11
-	pyenv install -s 3.5.2
+	pyenv install -s 3.6.1
 	pyenv install -s pypy-5.3.1
 	# pyenv install -s pypy3-2.4.0
-	pyenv local 2.7.11 3.5.2 pypy-5.3.1 # pypy3-2.4.0
+	pyenv local 2.7.11 3.6.1 pypy-5.3.1 # pypy3-2.4.0
 
 dev: env pyenv
 	pip install -Ur requirements.testing.txt
@@ -63,6 +63,6 @@ upload: clean
 	pyenv 2.7.11
 	python setup.py sdist upload
 	python setup.py bdist_wheel upload
-	pyenv 3.5.1
+	pyenv 3.6.1
 	python setup.py bdist_wheel upload
-	pyenv local 2.7.11 3.5.2 pypy-5.3.1
+	pyenv local 2.7.11 3.6.1 pypy-5.3.1