option to display version number

Author: apsteinberg

src/tcdo_pg_tools/cli.py

@@ -2,8 +2,11 @@
 from tcdo_pg_tools.fusion_merge import fusion_merge
 from tcdo_pg_tools.coverage_calculator import coverage_calculator
 from tcdo_pg_tools.merge_proteome import merge_pg_results, merge_fasta
+import importlib.metadata
 
 @click.group()
+@click.version_option(version=importlib.metadata.version('tcdo-pg-tools'),
+                      message="%(version)s")
 def cli():
     pass