Fix Python 3.12 install by bumping versioneer.

Author: J08nY

picoscope/__init__.py

@@ -10,6 +10,5 @@
            "ps5000a",
            "ps6000"]
 
-from ._version import get_versions
-__version__ = get_versions()['version']
-del get_versions
+from . import _version
+__version__ = _version.get_versions()['version']