Update to Drupal 8.1.7. For more information, see https://www.drupal.org/project/drupal/releases/8.1.7

vendor/guzzlehttp/psr7/Makefile

@@ -9,5 +9,21 @@ coverage:
 view-coverage:
 	open artifacts/coverage/index.html
 
+check-tag:
+	$(if $(TAG),,$(error TAG is not defined. Pass via "make tag TAG=4.2.1"))
+
+tag: check-tag
+	@echo Tagging $(TAG)
+	chag update $(TAG)
+	git commit -a -m '$(TAG) release'
+	chag tag
+	@echo "Release has been created. Push using 'make release'"
+	@echo "Changes made in the release commit"
+	git diff HEAD~1 HEAD
+
+release: check-tag
+	git push origin master
+	git push origin $(TAG)
+
 clean:
 	rm -rf artifacts/*