module: add Make target for rebasing three branch

Makefile

@@ -21,6 +21,17 @@ lint: ## Lint all source code
 test: ## Run all tests
 	poetry run pytest
 
+.PHONY: rebase-three-branch
+rebase-three-branch: ## Rebase the py3 branch with master contents
+	git stash
+	git checkout master
+	git pull
+	git checkout three
+	git rebase -i origin/master
+	git push --force-with-lease
+	git checkout master
+	git stash pop
+
 .PHONY: help
 help: ## Print this help text
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-15s\033[0m %s\n", $$1, $$2}'