release: Drop Python 3.4, 3.5 and add 3.9 and 3.10

Author: florisla

noxfile.py

@@ -5,7 +5,11 @@
 import nox
 
 
-@nox.session(python=["3.4", "3.5", "3.6", "3.7", "3.8"])
+DEFAULT_PYTHON_VERSION = "3.9"
+ALL_PYTHON_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+
+
+@nox.session(python=ALL_PYTHON_VERSIONS)
 def tests(session):
     """
     Install stm32loader package and execute unit tests.
@@ -23,7 +27,7 @@ def tests(session):
     session.run("pytest", "./")
 
 
-@nox.session(python=["3.6"])
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 def lint(session):
     """
     Run code verification tools flake8, pylint and black.

setup.cfg

@@ -6,7 +6,6 @@ license_file = LICENSE
 
 [isort]
 line_length = 98
-line_width = 98
 multi_line_output = 2
 
 [flake8]

setup.py

@@ -16,7 +16,7 @@
 URL = 'https://github.com/florisla/stm32loader'
 EMAIL = '[email protected]'
 AUTHOR = 'Floris Lambrechts'
-REQUIRES_PYTHON = '>=3.4.0'
+REQUIRES_PYTHON = '>=3.6.0'
 PROJECT_URLS = {
     "Bug Tracker": "https://github.com/florisla/stm32loader/issues",
     "Source Code": "https://github.com/florisla/stm32loader",
@@ -28,7 +28,7 @@
 ]
 
 EXTRAS = {
-    "dev": ['setuptools', 'wheel', 'twine', 'pylint', 'flake8', 'flake8-isort', 'black', 'bump2version'],
+    "dev": ['setuptools', 'wheel', 'twine', 'pylint', 'flake8', 'flake8-isort', 'black', 'bump2version', 'nox'],
 }
 
 HERE = os.path.abspath(os.path.dirname(__file__))
@@ -64,11 +64,11 @@
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        '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 :: 3.10',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Natural Language :: English',