add version to manpage

Author: lonvia

docs/Makefile

@@ -1,8 +1,9 @@
 ARGPARSE_BASEARGS=--author 'Sarah Hoffmann' --author-email 'lonvia@denofr.de' --project-name pyosmium --url https://github.com/osmcode/pyosmium/
+PYOSMIUM_VERSION=$(shell python3 -c 'import osmium.version;print(osmium.version.pyosmium_release)' | tail -n 1)
 
 man:
 	mkdir -p man
-	argparse-manpage --module osmium.tools.pyosmium_get_changes --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-get-changes.1
-	argparse-manpage --module osmium.tools.pyosmium_up_to_date --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-up-to-date.1
+	argparse-manpage --module osmium.tools.pyosmium_get_changes --version '${PYOSMIUM_VERSION}' --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-get-changes.1
+	argparse-manpage --module osmium.tools.pyosmium_up_to_date --version '${PYOSMIUM_VERSION}' --function get_arg_parser ${ARGPARSE_BASEARGS} --output man/pyosmium-up-to-date.1
 
 .PHONY: man