Determine the type of a key

[bruaba]

No description provided.

[bruaba]

add get type of a key to redis async connection
follow #931

[jaymell]

Thanks for the PR!

I personally think I prefer key_type instead of type_key. What do you think? Could we also add a small test -- in test_basic.rs should be fine.

[bruaba]

@jaymell
"I personally think I prefer key_type instead of type_key. What do you think?"
yes you are right it sounds better in English, I was thinking in French hence the type key.

"Could we also add a small test -- in test_basic.rs should be fine."
I added some tests in the test_basic.rs file, hope they will be fine for you.

[jaymell]

@nihohit LGTM