Update mockito requirement from = 1.5.0 to = 1.6.1

Updates the requirements on [mockito](https://github.com/lipanski/mockito) to permit the latest version.
- [Release notes](https://github.com/lipanski/mockito/releases)
- [Commits](lipanski/mockito@1.5.0...1.6.1)

---
updated-dependencies:
- dependency-name: mockito
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -22,5 +22,5 @@ thiserror = "1.0"
 
 [dev-dependencies]
 assert_matches = "1.5"
-mockito = "= 1.5.0"
+mockito = "= 1.6.1"
 colored = "= 2.1.0"