drop support for python < 3.7

Author: ThibHlln

changelog.rst

@@ -7,7 +7,7 @@ Yet to be versioned and released. Only available from *dev* branch until then.
 
 .. rubric:: General
 
-* drop support for Python 2.7.x
+* drop support for Python 2.7.x and Python < 3.7
 
 .. rubric:: Big fixes
 

setup.py

@@ -46,9 +46,9 @@ def requirements(filename):
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX :: Linux',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: Implementation :: CPython'
     ],
     packages=find_packages(exclude=["docs*"]),