DevKit updates (#3919)

Makefile

@@ -9,8 +9,9 @@ all:
 
 lint:
 	composer validate
-	find . -name '*.yml' -not -path './vendor/*' | xargs yaml-lint
-	find . \( -name '*.xml' -or -name '*.xliff' \) -not -path './vendor/*' -type f \
+	find . -name '*.yml' -not -path './vendor/*' -not -path './Resources/public/vendor/*' | xargs yaml-lint
+	find . \( -name '*.xml' -or -name '*.xliff' \) \
+		-not -path './vendor/*' -not -path './Resources/public/vendor/*' -type f \
 		-exec xmllint --encode UTF-8 --output '{}' --format '{}' \;
 	git diff --exit-code