clippy: Configure lint unwrap_used

By setting `allow-unwrap-in-tests`, we can avoid repeating
`allow(clippy::unwrap_used)` many times over.

clippy.toml

@@ -0,0 +1 @@
+allow-unwrap-in-tests = true

crates/radicle/src/cob/test.rs

@@ -1,4 +1,3 @@
-#![allow(clippy::unwrap_used)]
 use std::marker::PhantomData;
 use std::ops::Deref;
 

crates/radicle/src/storage/refs/sigrefs/git/properties.rs

@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 use crypto::{signature, test::signer::MockSigner, PublicKey, Signer as _};
 use qcheck::TestResult;
 use qcheck_macros::quickcheck;

crates/radicle/src/storage/refs/sigrefs/property.rs

@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 mod mock;
 use mock::*;
 

crates/radicle/src/storage/refs/sigrefs/read/test.rs

@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 mod mock;
 
 mod commit_reader;

crates/radicle/src/storage/refs/sigrefs/write/test.rs

@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 mod mock;
 
 mod commit_writer;