chore(deps): bump mockito from 1.7.1 to 1.7.2 in /backend (#191)

Bumps [mockito](https://github.com/lipanski/mockito) from 1.7.1 to 1.7.2.
- [Release notes](https://github.com/lipanski/mockito/releases)
- [Commits](lipanski/mockito@1.7.1...1.7.2)

---
updated-dependencies:
- dependency-name: mockito
  dependency-version: 1.7.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/Cargo.lock

@@ -29,7 +29,7 @@
   strata-primitives = { git = "https://github.com/alpenlabs/alpen.git", tag = "v0.2.0-rc4" }
 
 [dev-dependencies]
-  mockito = "1.7.1"
+  mockito = "1.7.2"
 
 [[bin]]
   name = "backend"