use git scm

pystac_extension_instrument/__init__.py

 """Instrument extension for pystac."""
 
+from importlib.metadata import version, PackageNotFoundError
 from .instrument import InstrumentModel, Instrument  # noqa
 
-__version__ = "0.0.2"
+try:
+    __version__ = version("pystac-extension-instrument")
+except PackageNotFoundError:
+    pass