Drop support for Python 3.7

Python 3.7 is end-of-life since yesterday.

Author: schodet

.builds/freebsd.yml

@@ -1,7 +1,6 @@
 image: freebsd/latest
 packages:
   - python3
-  - python37
   - python38
   - python39
   - python310

setup.cfg

@@ -10,7 +10,6 @@ url = https://github.com/schodet/nxt-python/
 classifiers =
 	Programming Language :: Python :: 3
 	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
@@ -29,7 +28,7 @@ scripts =
 	scripts/nxt_push
 	scripts/nxt_server
 	scripts/nxt_test
-python_requires = >=3.7
+python_requires = >=3.8
 install_requires =
 	pyusb >= 1.2.1
 

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py37, py38, py39, py310, py311
+envlist = py38, py39, py310, py311
 
 [testenv]
 deps =