[HOOK - conan-center.py] pre_export(): ERROR: [NO REQUIRES.ADD() (KB-H044)] The method 'self.requires.add()' is not allowed. Use 'self.requires()' instead. (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H044) 
ERROR: [HOOK - conan-center.py] pre_export(): Some checks failed running the hook, check the output