Add support for HSTRLEN [DATAREDIS-698]

[spring-projects-issues]

Christoph Strobl opened DATAREDIS-698 and commented

---

Reference URL: https://redis.io/commands/hstrlen

Issue Links:

• DATAREDIS-694 Add support for TOUCH
  ("is depended on by")

Referenced from: pull request #283, and commits f6a17fb, 8adea79, 8f7f15f, be3d937, ba3ff9f, 5dcb161