Drop Python 3.5 support

Author: amorison

docs/sources/install.rst

@@ -1,7 +1,7 @@
 Installation
 ============
 
-You will need Python 3.5 or higher to use StagPy. StagPy is available on
+You will need Python 3.6 or higher to use StagPy. StagPy is available on
 the Python Package Index, via ``pip``.
 
 If Python3 is not installed on your system or you don't have sufficient
@@ -35,7 +35,7 @@ Make sure that the directory where ``pip`` install package entry-points
 (usually ``~/.local/bin``) is in your ``PATH`` environment variable.
 You can run ``python3 -m pip show stagpy`` to obtain some hint about this
 location (this command will show you were the compiled sources are installed,
-e.g. ``~/.local/lib/python3.5/site-packages``, from which you can deduce the
+e.g. ``~/.local/lib/python3.8/site-packages``, from which you can deduce the
 entry-point location, e.g. ``~/.local/bin``).
 
 See the `Some setup`_ subsection to enable autocompletion and create your

setup.py

@@ -41,13 +41,12 @@
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
         'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
     ],
 
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     packages=['stagpy'],
     entry_points={
         'console_scripts': ['stagpy = stagpy.__main__:main']

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py35,py36,py37,py38,flake8
+envlist = py36,py37,py38,flake8
 skip_missing_interpreters = True
 skipsdist=True