added a default deserialisation to adaptive_formats

[fabi321]

No description provided.

[fabi321]

How should we handle this? Error due to update of rust nightly. It compiled on my machine even after updating my nightly version.

[DzenanJupic]

@fabi321 thank you for the PR!

How should we handle this? Error due to update of rust nightly. It compiled on my machine even after updating my nightly version.

I actually ran into a similar problem and thought it was a bug.

For us there are two options:

1. Just use the new proposed way of .ok_or(Error::NoStreams) (playground)
2. Make our own Result type (playground)

Since the own Result type leads to a bunch of weird situations, I guess, as sad as it might be, we have to go with option one, and replace each opt? with opt.ok_or(Error::NoStreams).