`ScopedProtocol::interface` claims to be deprecated since 0.16.0, but the replacement `Deref`/`DerefMut` didn't make it into 0.16.0

[ColinFinck]

I just had a confusion when trying to run examples from the "main" branch with latest released uefi-rs crate 0.16.0.
It turns out that you cannot yet call open_protocol and just dereference the returned ScopedProtocol to the actual Protocol, because #434 didn't make it into 0.16.0.

What is even more confusing though is this attribute in the current "main" branch:

uefi-rs/src/table/boot.rs

Lines 1399 to 1400 in d3206d6

	#[deprecated(since = "0.16.0", note = "use Deref and DerefMut instead")]
	pub interface: &'a UnsafeCell<P>,

Claiming that ScopedProtocol::interface was deprecated in 0.16.0 is wrong when it was actually only deprecated in "main".

I don't know what your next release will be, but the attribute should first be updated to the version number of that release.

[nicholasbishop]

Good catch, apologies for the confusion that created. PR is up to bump since to the next version.