lmdb::dbi::open should take a string_view

[deepbluev7]

If you store the names of sub dbs in a db, you need to first convert them to a std::string and then call c_str() on it, to be able to pass it safely to dbi::open. Imo it should be possible to pass the string_view directly.

This is a small UX fix, otherwise I really enjoy using this library, thank you for maintaining it!

[hoytech]

Good idea, thank you for requesting it! I just pushed a commit that I think should do what you want. Let me know if not 👍

[deepbluev7]

Wow, awesome, thank you! That was super quick!