fix: rename get_users to get_os_users for napalm-device-types 4.7

napalm-device-types 4.7 renamed OSDriver.get_users to get_os_users:
NAPALM's own get_users has another shape and a stub on every driver, so
hasattr could not tell the two apart. BsdDriver now implements
get_os_users with the same return shape and leaves NAPALM's get_users
alone.

Require napalm-device-types>=4.7.1 and bump the version to 0.2.0.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-bsd"
-version = "0.1.0"
+version = "0.2.0"
 description = "NAPALM drivers for FreeBSD and OpenBSD hosts via SSH"
 readme = "README.md"
 requires-python = ">=3.10"
@@ -26,7 +26,7 @@ classifiers = [
 ]
 dependencies = [
     "napalm>=4.0",
-    "napalm-device-types>=2.6.0",  # channel.run_on_transport
+    "napalm-device-types>=4.7.1",  # channel.run_on_transport; OSDriver.get_os_users
     "paramiko>=5.0.0",  # CVE-2026-44405
 ]