Drop support for Python 3.7

"The release you are looking at is Python 3.7.17, the final security
bugfix release for the legacy 3.7 series which has now reached
end-of-life and is no longer supported."

https://www.python.org/downloads/release/python-3717/

.github/workflows/test_and_publish.yml

@@ -13,7 +13,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         python-version:
-        - '3.7'
         - '3.8'
         - '3.9'
         - '3.10'

setup.cfg

@@ -22,7 +22,6 @@ classifiers =
     Topic :: System :: Networking
     Topic :: System :: Networking :: Monitoring
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
@@ -32,7 +31,7 @@ classifiers =
 packages = find:
 package_dir =
     =src
-python_requires = >=3.7, <4
+python_requires = >=3.8, <4
 install_requires =
     netaddr >= 0.7.19
     scapy >= 2.4.3

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py37, py38, py39, py310, flake8, pylint
+envlist = py38, py39, py310, flake8, pylint
 skip_missing_interpreters = true
 minversion = 3.0
 isolated_build = true
@@ -29,7 +29,6 @@ commands =
 [gh-actions]
 description = "tox configuration when running on GitHub Actions"
 python =
-    3.7: py37, flake8, pylint
     3.8: py38, flake8, pylint
     3.9: py39, flake8, pylint
     3.10: py310, flake8, pylint