* fix all the spec errors! at least TG API is COMPLIANT now ([dea5879](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/dea587977490cb1d3f86ae1d7b869813c4cac381))
* fix dates: UTC format for OAI things, ISO format for TG and DH things ([ca97a8c](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/ca97a8c74eabbf79b1cbc2a791dbde732dcb2205))
* fix OAI error with non existent works mentioned in isEditionOf fields ([1063209](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/10632093ad88db24fb7641008d6a5b818bb686b7))
* increase metsmods module version ([a150a4a](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/a150a4af5e97cd2c5c1cfbb7ad3e30c3c8d04584))
* increase metsmods module version ([a298268](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/a29826852688334cd8c4d0ba4395818d7a6e570a))
* increase metsmods module version, set to next release ([77538b8](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/77538b8a42d7200b928f3ab11af697b9f1b9477a))
* refactor some of the calendar methods, add tests ([e54a468](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/e54a468e7d4977e14d56c077d43ea5e9281ff9b4))
* remove sandbox items from dc record list ([173cbca](https://gitlab.gwdg.de/dariah-de/dariah-de-oai-pmh-services/commit/173cbca5973d7bc2081e1db7ed92ff022f08e925))