retire soon-to-be EoL Python 3.7. Hello walrus operator...

src/setup.cfg

@@ -13,15 +13,15 @@ keywords = google, oauth2, gsuite, google-apps, google-admin-sdk, google-drive,
 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
+    Programming Language :: Python :: 3.11
     License :: OSI Approved :: Apache License
 
 [options]
 packages = find:
-python_requires = >= 3.7
+python_requires = >= 3.8
 install_requires =
     cryptography
     distro; sys_platform == 'linux'
@@ -33,9 +33,9 @@ install_requires =
     httplib2 >= 0.20.2
     importlib.metadata; python_version < '3.8'
     passlib >= 1.7.4
-    python-dateutil
-    yubikey-manager >= 4.0.0
     pathvalidate
+    python-dateutil
+    yubikey-manager >= 5.0
 
 [options.package_data]
 * = *.pem