chore: add change history

Author: cdimascio

CHANGE_HISTORY.md

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+## 2.4.0 (2020-12-01)
+
+* chore: increment minor version ([c61583f](https://github.com/cdimascio/uuid-mongodb/commit/c61583f))
+* Exported type for mode ([d2489a4](https://github.com/cdimascio/uuid-mongodb/commit/d2489a4))
+* update deps ([781fb82](https://github.com/cdimascio/uuid-mongodb/commit/781fb82))
+* fix: upgrade mongodb from 3.6.2 to 3.6.3 ([8093b03](https://github.com/cdimascio/uuid-mongodb/commit/8093b03))
+
+
+