Feature request: `set_dictionary`

[torokati44]

It would be nice to have the mentioned functionality in flate2 even when relying on pure Rust code.

This got forwarded here from rust-lang/flate2-rs#358, see that for a bit more details.

[Rigidity]

Hi, any update on this?

[oyvindln]

I can't give any timeframe but been meaning to look at it at some point (unless someone else decides to implement it before me.)