Merge branch 'kpn/4/master_release_version' into 'master'

fix: #4 add --skip-existing on twine upload

Closes #4

See merge request !20

Makefile

-CI_MERGE_REQUEST_TARGET_BRANCH_NAME ?= 'master'
+CI_MERGE_REQUEST_TARGET_BRANCH_NAME ?= ''
 
 ifeq ($(CI_MERGE_REQUEST_TARGET_BRANCH_NAME), 'master')
 	EGG_INFO = egg_info --tag-date
@@ -17,4 +17,4 @@ build-wheel:
 	@python3 setup.py $(EGG_INFO) sdist bdist_wheel
 
 publish-wheel:
-	@twine upload dist/*
+	@twine upload --skip-existing  dist/*